Change effective on 03 December 2014
With the latest release of Heroku Toolbelt, HTTP Git is now the default configuration used when repos are configured when running commands such as
heroku git:remote and
heroku git:clone. To configure SSH transport instead, simply pass the
--ssh-git flag to these commands. For example:
$ heroku create --ssh-git
Read more about Git on Heroku on Dev Center.