git push遇到503错误的解决方案：The requested URL returned error: 503

git remote set-url origin https://your-user-name@github.com/your-user-name/your-project-name.git

参考了这个blog:

https://www.shuizhongyueming.com/2013/11/18/solution-for-the-503-error-when-take-command-git-push/

文章中提出了两种解决方案，尝试了ssh协议，没成功。