git push -u origin master
Permission denied (publickey).
fatal: Could not read from remote repository. Please make sure you have the correct access rights
and the repository exists.
似乎GitHub for Windows 设置的ssh key在命令行下就不能用。只需在Git Bash配置SSH KEY就可以解决
参考：GitHub Help
中途遇到个问题，在输入passphrase时，按键盘但Git Bash上无显示，特咨询GitHub，得到如下答复:
That is how the password question works. Most password fields show a * character, but the command line doesn't show anything.
It's a little inconvenient, but even though it doesn't show anything it is reading what you type.
解释为：即使你看不见，但仍在读入你输入的东西
按照官方教程即可搞定