//1、config user
git config user.name "yourname"
git config user.email "youremail"
git config credential.helper store
//2、delete remote branch
git push origin --delete <branchName>
//3、delete tag
git tag -d 标签名
//4、delete remote tag
git push origin --delete tag <tagname>
//5、ignore local change
git fetch --all
//6、update git after delete branchName
git fetch -p
//7 show all branch
git branch