I wish I did! It's very skewed towards those wanting to contribute to Fedora, so the part before makes sense.
The doc above (and a former roommate) are the best resources I have!
I've had to expend a bit of trial/error to familiarize myself with a number of quirks... the rough process looks like this:
fedpkg mockbuild
copr-cli build $ProjectName ./results_$PKGNAME/path/to/project.srpm -r $mock_root
This assumes there's an RPM spec file in your working directory and proper handling of sources within/nearby. Fedpkg will create a 'results' directory with the SRPM and RPMs
The -r $mock_root part can be repeated if you want to build against multiple targets in COPR