git clone instructions fail

[sgehrman]

$ git clone git@github.com:nullstyle/go-codegen.git

Cloning into 'go-codegen'...
Permission denied (publickey).
fatal: Could not read from remote repository.

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

should it be: git clone https://github.com/nullstyle/go-codegen.git ?