https://www.cnblogs.com/tocy/p/git-rebase-merge-commit.htmlhtml
https://blog.csdn.net/zhezhebie/article/details/79420752git
http://www.javashuo.com/article/p-ezuzzacn-cc.html.net
https://www.git-scm.com/docs/git-refloghtm
http://www.javashuo.com/article/p-kcxsbsny-kh.htmlblog
https://www.cnblogs.com/starrytales/archive/2016/07/05/5644085.htmlget