Once we have a remote repo (on GitHub or elsewhere), we'll need a way to bring that project onto our own computer. Cloning will do the trick for us:
git clone email@example.com:scotch-io/my-repo.git
Make sure that your SSH keys are setup and you have access to that repo. If you use the SSH url (firstname.lastname@example.org), then you will authenticate with SSH keys. If you use the HTTPS way (https://github.com/) then you'll authenticate with user/pass.