git 切换远程仓库出现如下问题：
$ git checkout -b localdev origin/dev
fatal: Cannot update paths and switch to branch 'localdev' at the same time.
Did you intend to checkout 'origin/dev' which can not be resolved as commit?
解决方法：先执行git fetch origin。要下班了，详细情况下回在细说。
'origin/master' which can not be resolved as commit
Strange: you need to check your remotes:
git remote -v
And make sure origin is fetched:
git fetch origin
Then:
git branch -avv
(to see if you do have fetched an origin/master branch)
