Always clone via SSH regardless of using an HTTPS URL.

gitconfig-use_ssh_for_github.conf

# Use SSH instead of HTTPS for github.com
[url "ssh://git@github.com/RichardBronosky"]
    # This one allows you to clone from the URL in your browser address bar
    insteadOf = https://github.com/RichardBronosky

# Use SSH instead of HTTPS for gist.github.com
# No, gist URLs do not indluce the username.
[url "ssh://git@gist.github.com/"]
# This one allows you to clone from the URL in your browser address bar. Example URL:
# https://gist.github.com/RichardBronosky/9db43c0e374933c82401fb2be85494aa
# Yes, the trailing slash is needed for gists but not for regular repos.
    insteadOf = https://gist.github.com/RichardBronosky/
# This one allows you to use the "Clone via HTTPS" button. Example URL:
# https://gist.github.com/9db43c0e374933c82401fb2be85494aa.git
    insteadOf =  https://gist.github.com/