错误描述：
error: object file
.git/objects/9a/83e9c5b3d697d12a2e315e1777ceaf27ea1bab is emptyfatal: loose object 9a83e9c5b3d697d12a2e315e1777ceaf27ea1bab (stored
in .git/objects/9a/83e9c5b3d697d12a2e315e1777ceaf27ea1bab) is corrupt
解决方法：
$ rm -fr .git $ git init $ git remote add origin your-git-remote-url $ git fetch $ git reset --hard origin/master $ git branch --set-upstream-to=origin/master master