1、查看提交历史

   sudo git log

  打印如下内容:

   commit 2e3c19d412ab6a99bb51f338f71537a720a9c706
   Author: huangbaoguo <baoguohuang@163.com>
   Date:   Tue Nov 20 21:55:25 2018 -0500

    Add README.md

2、下载指定版本

  sudo git  2e3c19d412ab6a99bb51f338f71537a720a9c706