这将合并新旧两个分支，并在每次合并冲突时选择新版本:

git checkout old
git merge new
git checkout --theirs .
git add .
git commit

这将合并新旧两个分支，并在每次合并冲突时选择新版本:

git checkout old
git merge new
git checkout --theirs .
git add .
git commit

如果你只想让“email”和“staging”这两个分支保持一致，你可以标记“email”分支，然后将“email”分支重置为“staging”分支:

$ git checkout email
$ git tag old-email-branch
$ git reset --hard staging

你也可以将“staging”分支重新建立在“email”分支上。但是结果将包含两个分支的修改。

如何:

git branch -D email
git checkout staging
git checkout -b email
git push origin email --force-with-lease

这个分支不会改变原来更新的分支，并让您有机会在最终提交之前进行进一步的修改。

git checkout new -b tmp
git merge -s ours old -m 'irrelevant'
git checkout old
git merge --squash tmp
git branch -D tmp
#do any other stuff you want
git add -A; git commit -m 'foo' #commit (or however you like)

git checkout email
git merge -m "Making email same as staging disregarding any conflicts from email in the process" -s recursive -X theirs staging