我正在浏览Github的分叉指南:https://guides.github.com/activities/forking/ 我正在尝试将存储库克隆到我的计算机上。但是，执行以下命令:

$ git clone https://github.com/./Spoon-Knife.git
Cloning into 'Spoon-Knife'...
fatal: protocol 'https' is not supported

也尝试了SSH:

$ git clone git@github.com:./Spoon-Knife.git
Cloning into 'Spoon-Knife'...
Warning: Permanently added the RSA host key for IP address '.' to the list of known hosts.
git@github.com: Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

我需要改变我的计算机上的一些配置设置，或者这是一个问题与GitHub?

编辑:我已经用“”替换了我的用户名和IP地址。