git clone git://github.com/Unknwon/qiniudrive.git This uses the git protocol.

git@github.com:Unknwon/qiniudrive.git This is using ssh protocol. ssh will verify the key of the other party's server. It has no way to confirm that the key presented by the server is trusted, so it asks you whether the key really belongs to the server you want to connect to. You didn't say "yes"So ssh thinks you don't want to continue connecting, so the connection fails.

Actually, this problem can be solved with just a Google search.

Although it can be solved, you can actually understand the general principles of git.
That is, there is usually a git user on the server, and you access project files through the git user.

So how to log in to the remote host through git to get the code? Let’s take a look at ssh login again.

There are two ways to authenticate ssh, one is to enter the password, and the other is direct RSA authentication (RSA authentication is recommended). There will be a .ssh folder in the home directory, which is used to store public keys, private keys, known_host, authorized_keys and configuration files.

....10,000 words are omitted here

How to solve your problem specifically, I still hope you can Google it yourself. If you encounter a problem, try to solve it yourself first. If you can't solve it, ask Google. If the problem cannot be solved by Google, it will be better to ask it later.

http://itfan.github.io/#show/2013-06-07-use-github-on-windows