这种方式是最快最有效的
进项目根目录启动git bash，然后执行这些即可
最后的 git push -f origin master 会失败，直接在idea里push就能成功了
1.Checkout git checkout --orphan latest_branch 2. Add all the files git add -A 3. Commit the changes git commit -am "commit message" 4. Delete the branch git branch -D master 5.Rename the current branch to master git branch -m master 6.Finally, force update your repository git push -f origin master
原文：https://www.cnblogs.com/kinome/p/9651582.html