初始化仓库：git init
把文件添加到仓库：git add README.md
把文件提交到仓库：git commit -m "first commit"
关联远程仓库：git remote add origin https://xxx/xxx/demo.git
推送到远程仓库：git push -u origin master
拉取到本地：git pull origin master
查看提交日志：git log
版本回退：git reset --hard HEAD^(或commit_id)