Update failed

cannot lock ref 'refs/remotes/origin/master': unable to resolve reference 'refs/remotes/origin/master': reference broken

From https://gitee.com/wanmait/shop

! [new branch]      master     -> origin/master  (unable to update local ref)

在终端中执行下面三条命令试试：

rm .git/refs/remotes/origin/master
git fetch 
git branch --set-upstream-to=origin/master