"I'm guessing we need a couple utilities at the perl infrastructure level: One to "fork" a cpan dist in to github (for dists that aren't on github, but L4P already is), and then an update to cpan/cpanm to get it to prefer where to get a specific dist from."
First, create the repository on your Github. I created one called simply "log4perl", then:
cpan -g Log::Log4perl
tar -xzvf Log-Log4perl-1.49.tar.gz
git add .
git remote add origin https://firstname.lastname@example.org/stevieb9/log4perl.gi
git push -u origin master
Now you've make a fork of the 1.49 version of the distribution on your own Github.
Now, when you want to install with cpanm:
git clone https://github.com/stevieb9/log4perl
Or, do a make dist in your repository, add the newly created tarball into the repo and do a push, then: