enhancementgood first issuehelp wanted
説明
Currently if you try to clone a repository from github and you don't have any ssh keys configured at github, you will fail to clone and get such message:
Fatal error: fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.
Even Permission denied (publickey). message is not shown.
@guyzmo offered to "suggest adding an SSH key when none is present"