无法删除git远程分支的问题

当删除远程分支时，可能会出错以下的错误：

$ git push origin :alpha

remote: error: By default, deleting the current branch is denied, because the next

remote: error: 'git clone' won't result in any file checked out, causing confusion.

remote: error:

remote: error: You can set 'receive.denyDeleteCurrent' configuration variable to

remote: error: 'warn' or 'ignore' in the remote repository to allow deleting the

remote: error: current branch, with or without a warning message.

remote: error:

remote: error: To squelch this message, you can set it to 'refuse'.

remote: error: refusing to delete the current branch: refs/heads/alpha

To remote_repository_uri.git

! [remote rejected] alpha (deletion of the current branch prohibited)

error: failed to push some refs to 'remote_repository_uri.git'

原因好像是因为HEAD指向了要删除的分支。

解决方法有两个：

1，修改HEAD的指向
http://www.drkdidel.be/en/blog/84/git-refusing-to-delete-a-remote-branch-because-it-is-set-as-current
2，修改git的配置

（没具体试过，但上面的错误信息来说，如果删除的话，可能导致git clone命令无法check out出文件，

    所以感觉还是方法1好一些）
http://blog.csdn.net/sunalongl/article/details/52013435