1.新建和删除分支

git checkout --orphan emptybranch
git rm -rf .
echo '# new branch' >> README.md
git add README.md
git commit -m 'new branch'
git push origin emptybranch

2.回滚代码

git reset --hard 目标版本号”
git push -f

3.合并分支

git remote add upstream <原仓库git地址>
git fetch upstream
git merge origin2/master --allow-unrelated-histories

4.删除分支

git checkout <another_branch>
git branch -d <branch_name>
git branch -D <branch_name>
git push <remote_name> --delete <branch_name>

5.仓库迁移

git clone --bare ssh://url
cd xxx-ui.git/
git push --mirror ssh://url