我通常将-p标志与来自其他分支的git签出一起使用，我发现这比我遇到的大多数其他方法更容易和更精细。

原则上：

git checkout <other_branch_name> <files/to/grab in/list/separated/by/spaces> -p

例子：

git checkout mybranch config/important.yml app/models/important.rb -p

然后，您会看到一个对话框，询问您希望在“blobs”中进行哪些更改，这基本上适用于连续代码更改的每个块，然后您可以为每个代码块发出y（是）n（否）等信号。

-p或patch选项适用于git中的各种命令，包括git stash save-p，它允许您从当前工作中选择要隐藏的内容

当我做了很多工作，并希望将其分离出来，使用gitadd-p提交更多基于主题的提交，并选择每次提交所需的内容时，我有时会使用此技术：）

您可以使用：

git diff <commit>^ <commit> -- <path> | git apply

符号<commit>^指定<commit>的（第一个）父级。因此，这个diff命令选择在commit＜commit＞中对＜path＞所做的更改。

注意，这还不会提交任何内容（正如gitcherry-pick所做的那样）。所以，如果你想这样做，你必须做到：

git add <path>
git commit

Cherry pick是从特定的“提交”中选择更改。最简单的解决方案是选择某些文件的所有更改

 git checkout source_branch <paths>...

例如：

$ git branch
* master
  twitter_integration
$ git checkout twitter_integration app/models/avatar.rb db/migrate/20090223104419_create_avatars.rb test/unit/models/avatar_test.rb test/functional/models/avatar_test.rb
$ git status
# On branch master
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
#
#   new file:   app/models/avatar.rb
#   new file:   db/migrate/20090223104419_create_avatars.rb
#   new file:   test/functional/models/avatar_test.rb
#   new file:   test/unit/models/avatar_test.rb
#
$ git commit -m "'Merge' avatar code from 'twitter_integration' branch"
[master]: created 4d3e37b: "'Merge' avatar code from 'twitter_integration' branch"
4 files changed, 72 insertions(+), 0 deletions(-)
create mode 100644 app/models/avatar.rb
create mode 100644 db/migrate/20090223104419_create_avatars.rb
create mode 100644 test/functional/models/avatar_test.rb
create mode 100644 test/unit/models/avatar_test.rb

来源和完整解释http://jasonrudolph.com/blog/2009/02/25/git-tip-how-to-merge-specific-files-from-another-branch/

更新：

使用此方法，git不会合并文件，它只会覆盖在目标分支上所做的任何其他更改。您需要手动合并更改：

$git diff HEAD文件名

我会使用cherry-pick-n（--no-commit）来完成，它允许您在提交之前检查（和修改）结果：

git cherry-pick -n <commit>

# unstage modifications you don't want to keep, and remove the
# modifications from the work tree as well.
# this does work recursively!
git checkout HEAD <path>

# commit; the message will have been stored for you by cherry-pick
git commit

如果绝大多数修改都是您不想要的，那么您可以重新设置所有内容，然后添加您想要的内容，而不是检查各个路径（中间步骤）：

# unstage everything
git reset HEAD

# stage the modifications you do want
git add <path>

# make the work tree match the index
# (do this from the top level of the repo)
git checkout .

将分支合并为新分支（挤压）并删除不需要的文件：

git checkout master
git checkout -b <branch>
git merge --squash <source-branch-with-many-commits>
git reset HEAD <not-needed-file-1>
git checkout -- <not-needed-file-1>
git reset HEAD <not-needed-file-2>
git checkout -- <not-needed-file-2>
git commit

与Jefromi的答案相比，这种方法的优势可能在于您不必记住git重置的哪个行为是正确的：）

 # Create a branch to throw away, on which we'll do the cherry-pick:
 git checkout -b to-discard

 # Do the cherry-pick:
 git cherry-pick stuff

 # Switch back to the branch you were previously on:
 git checkout -

 # Update the working tree and the index with the versions of A and B
 # from the to-discard branch:
 git checkout to-discard -- A B

 # Commit those changes:
 git commit -m "Cherry-picked changes to A and B from [stuff]"

 # Delete the temporary branch:
 git branch -D to-discard