本文记录一个比较不常用的git操作，场景为将一个库的某个分支，覆盖另一个库的某个分支。
. git_test, branch dev : github.com:xiangbin1997/git_test.git
. git_test1, branch master: github.com:xiangbin1997/git_test1.git
用git_test1，branch dev 替换 git_test, branch master
clone git_test1的dev分支
[postgres@hgcndn git_test1_dev]$ git clone -b dev git@github.com:xiangbin1997/git_test1.git
Cloning into 'git_test1'...
remote: Enumerating objects: 16, done.
remote: Counting objects: 100% (16/16), done.
remote: Compressing objects: 100% (12/12), done.
remote: Total 16 (delta 1), reused 11 (delta 0), pack-reused 0
Receiving objects: 100% (16/16), done.
Resolving deltas: 100% (1/1), done.
[postgres@hgcndn git_test1_dev]$ cd git_test1/
添加remote2，指向git_test
[postgres@hgcndn git_test1]$ git remote add origin2 git@github.com:xiangbin1997/git_test.git修改branch 为master
*如果覆盖同名branch，则这一步不需要
git branch -m dev master强制push到git_test的dev分支下
[postgres@hgcndn git_test1]$ git push -u origin2 master --force说明，如果不强制push会报错
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