你可以参考GitHub页面“复制存储库”

它使用:

Git克隆——镜像:克隆每个引用(提交，标签，分支) Git push—mirror:用于推送所有内容

这将给予:

git clone --mirror https://bitbucket.org/exampleuser/repository-to-mirror.git
# Make a bare mirrored clone of the repository

cd repository-to-mirror.git
git remote set-url --push origin https://github.com/exampleuser/mirrored
# Set the push location to your mirror

git push --mirror

正如L S在评论中指出的那样:

使用MarMass描述的GitHub导入代码功能更容易。 参见https://github.com/new/import 除非…您的回购包括一个大文件:问题是，导入工具将失败，没有一个明确的错误消息。只有GitHub支持才能诊断出发生了什么。

有导入一个存储库与GitHub导入器

如果你有一个项目托管在另一个版本控制系统上，如Mercurial，你可以使用GitHub Importer工具自动将它导入到GitHub。

在任意页面的右上角单击，然后单击“导入存储库”。 在"Your old repository's clone URL"下，输入你想要导入的项目的URL。 选择您的用户帐户或拥有存储库的组织，然后在GitHub上键入存储库的名称。 指定新的存储库应该是公共的还是私有的。

公共存储库对GitHub上的任何用户都是可见的，因此您可以从GitHub的协作社区中受益。 公共或私有存储库单选按钮私有存储库仅对存储库所有者以及您选择与之共享的任何合作者可用。

检查您输入的信息，然后单击开始导入。

当存储库完全导入后，您将收到一封电子邮件。

将项目导入GitHub 使用GitHub Importer导入存储库

如果你在GitHub上找不到“导入代码”按钮，你可以:

直接打开GitHub Importer并输入URL。它看起来像: 给它一个名字(或者它会自动导入这个名字) 选择Public或Private存储库 单击“开始导入”

2016年5月，GitHub宣布能够“导入带有大文件的存储库”。

几个月前，当我试图做同样的事情时，我发现了这个问题，并对给出的答案印象不深。他们似乎都在处理从Bitbucket一次一个存储库导入到GitHub的问题，要么是通过命令à点菜，要么是通过GitHub导入器。

我从一个名为gitter的GitHub项目中抓取了代码，并对其进行了修改以满足我的需求。

你可以分叉要点，或者从这里取代码:

#!/usr/bin/env ruby
require 'fileutils'

# Originally  -- Dave Deriso        -- deriso@gmail.com
# Contributor -- G. Richard Bellamy -- rbellamy@terradatum.com
# If you contribute, put your name here!
# To get your team ID:
# 1. Go to your GitHub profile, select 'Personal Access Tokens', and create an Access token
# 2. curl -H "Authorization: token <very-long-access-token>" https://api.github.com/orgs/<org-name>/teams
# 3. Find the team name, and grabulate the Team ID
# 4. PROFIT!

#----------------------------------------------------------------------
#your particulars
@access_token = ''
@team_id = ''
@org = ''


#----------------------------------------------------------------------
#the version of this app
@version = "0.2"

#----------------------------------------------------------------------
#some global parameters
@create = false
@add = false
@migrate = false
@debug = false
@done = false
@error = false

#----------------------------------------------------------------------
#fancy schmancy color scheme

class String; def c(cc); "\e[#{cc}m#{self}\e[0m" end end
#200.to_i.times{ |i| print i.to_s.c(i) + " " }; puts
@sep = "-".c(90)*95
@sep_pref = ".".c(90)*95
@sep_thick = "+".c(90)*95

#----------------------------------------------------------------------
# greetings

def hello
  puts @sep
  puts "BitBucket to GitHub migrator -- v.#{@version}".c(95)
  #puts @sep_thick
end

def goodbye
  puts @sep
  puts "done!".c(95)
  puts @sep
  exit
end

def puts_title(text)
   puts  @sep, "#{text}".c(36), @sep
end

#----------------------------------------------------------------------
# helper methods

def get_options
  require 'optparse'

  n_options = 0
  show_options = false

  OptionParser.new do |opts|
    opts.banner = @sep +"\nUsage: gitter [options]\n".c(36)
    opts.version = @version
    opts.on('-n', '--name [name]', String, 'Set the name of the new repo') { |value| @repo_name = value; n_options+=1 }
    opts.on('-c', '--create', String, 'Create new repo') { @create = true; n_options+=1 }
    opts.on('-m', '--migrate', String, 'Migrate the repo') { @migrate = true; n_options+=1 }
    opts.on('-a', '--add', String, 'Add repo to team') { @add = true; n_options+=1 }
    opts.on('-l', '--language [language]', String, 'Set language of the new repo') { |value| @language = value.strip.downcase; n_options+=1 }
    opts.on('-d', '--debug', 'Print commands for inspection, doesn\'t actually run them') { @debug = true; n_options+=1 }
    opts.on_tail('-h', '--help', 'Prints this little guide') { show_options = true; n_options+=1 }
    @opts = opts
  end.parse!

  if show_options || n_options == 0
    puts @opts
    puts "\nExamples:".c(36)
    puts 'create new repo: ' + "\t\tgitter -c -l javascript -n node_app".c(93)
    puts 'migrate existing to GitHub: ' + "\tgitter -m -n node_app".c(93)
    puts 'create repo and migrate to it: ' + "\tgitter -c -m -l javascript -n node_app".c(93)
    puts 'create repo, migrate to it, and add it to a team: ' + "\tgitter -c -m -a -l javascript -n node_app".c(93)
    puts "\nNotes:".c(36)
    puts "Access Token for repo is #{@access_token} - change this on line 13"
    puts "Team ID for repo is #{@team_id} - change this on line 14"
    puts "Organization for repo is #{@org} - change this on line 15"
    puts 'The assumption is that the person running the script has SSH access to Bitbucket,'
    puts 'and GitHub, and that if the current directory contains a directory with the same'
    puts 'name as the repo to migrated, it will deleted and recreated, or created if it'
    puts 'doesn\'t exist - the repo to migrate is mirrored locally, and then created on'
    puts 'GitHub and pushed from that local clone.'
    puts 'New repos are private by default'
    puts "Doesn\'t like symbols for language (ex. use \'c\' instead of \'c++\')"
    puts @sep
    exit
  end
end

#----------------------------------------------------------------------
# git helper methods

def gitter_create(repo)
  if @language
    %q[curl https://api.github.com/orgs/] + @org + %q[/repos -H "Authorization: token ] + @access_token + %q[" -d '{"name":"] + repo + %q[","private":true,"language":"] + @language + %q["}']
  else
    %q[curl https://api.github.com/orgs/] + @org + %q[/repos -H "Authorization: token ] + @access_token + %q[" -d '{"name":"] + repo + %q[","private":true}']
  end
end

def gitter_add(repo)
  if @language
    %q[curl https://api.github.com/teams/] + @team_id + %q[/repos/] + @org + %q[/] + repo + %q[ -H "Accept: application/vnd.github.v3+json" -H "Authorization: token ] + @access_token + %q[" -d '{"permission":"pull","language":"] + @language + %q["}']
  else
    %q[curl https://api.github.com/teams/] + @team_id + %q[/repos/] + @org + %q[/] + repo + %q[ -H "Accept: application/vnd.github.v3+json" -H "Authorization: token ] + @access_token + %q[" -d '{"permission":"pull"}']
  end
end

def git_clone_mirror(bitbucket_origin, path)
  "git clone --mirror #{bitbucket_origin}"
end

def git_push_mirror(github_origin, path)
  "(cd './#{path}' && git push --mirror #{github_origin} && cd ..)"
end

def show_pwd
  if @debug
    Dir.getwd()
  end
end

def git_list_origin(path)
  "(cd './#{path}' && git config remote.origin.url && cd ..)"
end

# error checks

def has_repo
  File.exist?('.git')
end

def has_repo_or_error(show_error)
  @repo_exists = has_repo
  if !@repo_exists
    puts 'Error: no .git folder in current directory'.c(91) if show_error
    @error = true
  end
  "has repo: #{@repo_exists}"
end

def has_repo_name_or_error(show_error)
  @repo_name_exists = !(defined?(@repo_name)).nil?
  if !@repo_name_exists
    puts 'Error: repo name missing (-n your_name_here)'.c(91) if show_error
    @error = true
  end
end

#----------------------------------------------------------------------
# main methods
def run(commands)
  if @debug
    commands.each { |x| puts(x) }
  else
    commands.each { |x| system(x) }
  end
end

def set_globals

  puts_title 'Parameters'

  @git_bitbucket_origin =   "git@bitbucket.org:#{@org}/#{@repo_name}.git"
  @git_github_origin = "git@github.com:#{@org}/#{@repo_name}.git"

  puts 'debug: ' + @debug.to_s.c(93)
  puts 'working in: ' + Dir.pwd.c(93)
  puts 'create: ' + @create.to_s.c(93)
  puts 'migrate: ' + @migrate.to_s.c(93)
  puts 'add: ' + @add.to_s.c(93)
  puts 'language: ' + @language.to_s.c(93)
  puts 'repo name: '+ @repo_name.to_s.c(93)
  puts 'bitbucket: ' + @git_bitbucket_origin.to_s.c(93)
  puts 'github: ' + @git_github_origin.to_s.c(93)
  puts 'team_id: ' + @team_id.to_s.c(93)
  puts 'org: ' + @org.to_s.c(93)
end

def create_repo
  puts_title 'Creating'

  #error checks
  has_repo_name_or_error(true)
  goodbye if @error

  puts @sep

  commands = [
      gitter_create(@repo_name)
  ]

  run commands
end


def add_repo
  puts_title 'Adding repo to team'

  #error checks
  has_repo_name_or_error(true)
  goodbye if @error

  puts @sep

  commands = [
      gitter_add(@repo_name)
  ]

  run commands
end

def migrate_repo

  puts_title "Migrating Repo to #{@repo_provider}"

  #error checks
  has_repo_name_or_error(true)
  goodbye if @error

  if Dir.exists?("#{@repo_name}.git")
    puts "#{@repo_name} already exists... recursively deleting."
    FileUtils.rm_r("#{@repo_name}.git")
  end

  path = "#{@repo_name}.git"
  commands = [
    git_clone_mirror(@git_bitbucket_origin, path),
    git_list_origin(path),
    git_push_mirror(@git_github_origin, path)
  ]

  run commands
end

#----------------------------------------------------------------------
#sequence control
hello
get_options

#do stuff
set_globals
create_repo if @create
migrate_repo if @migrate
add_repo if @add

#peace out
goodbye

然后，使用脚本:

# create a list of repos
foo
bar
baz

# execute the script, iterating over your list
while read p; do ./bitbucket-to-github.rb -a -n $p; done<repos

# good enough

根据@MarMass的回答，如果GitHub导入器不断将你重定向到身份验证屏幕，你需要在BitBucket中创建一个应用程序密码，以便导入你的私有存储库:

去Bitbucket >个人设置>应用程序密码。 创建具有存储库读访问权限的应用程序密码。 当在GitHub导入器中提示输入您的用户名/密码时，输入您的BitBucket用户名，并将上面创建的令牌作为密码。

在设法解决身份验证问题后，我的导入也出现了以下消息:“有一个错误将提交推到GitHub.”。

这里的问题是，至少对我来说，我的GitHub帐户被设置为“阻止暴露我的电子邮件的命令行推送”，而我试图从Bitbucket导入的存储库包含来自我个人电子邮件地址的提交。在暂时禁用这个设置(GitHub >设置>电子邮件)后，我就可以去了。

最简单的方法:

git remote rename origin repo_bitbucket

git remote add origin https://github.com/abc/repo.git

git push origin master

一旦推送到GitHub成功，通过运行以下命令删除旧的远程:

git remote rm repo_bitbucket