添加第二個遠程地址時使用以下命令：
git remote set-url --add origin git@github.com:morethink/programming.git
查看遠程分支：git remote -v
origin git@git.coding.net:morethink/programming.git (fetch)
origin git@git.coding.net:morethink/programming.git (push)
origin hexo@MyHost2:/var/repo/gitbook.git (push)
也可以同時 push 到多個遠程地址：git push origin master
Everything up-to-date
Everything up-to-date