The guide has users clone with the --anonymous flag. fedpkg fork
detects when the origin is using https, and will also set up the fork to
use https, not ssh. This corrects the output of the git remote command
to match.
Pull requests are an important aspect of how Fedora packaging works,
and, crucially, the easiest way for new contributors to get started.
Document a way how they can be used.
Fixes#66
