git报错及解决

git diff --name-status master 5803a9f7baf2043c911000d1d31694f0a7ffa2d6

fatal: ambiguous argument 'master': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions

可能没有HEAD 
git branch -r 看看

解决，直接删除这个项目，再clone一份