pkgsrc and github archives

I recently switched pkgin’s repository from SourceForge’s CVS to GitHub. Long story short, I heard here and there that SF was considering to drop CVS support and I found GitHub service to be more responsive and elegant. Also, I was looking for an excuse to learn git :) Anyway, GitHub interface may be sexy, they used to have some kind of “upload” section which has been dropped. That may sound like a simple story, but the fact is when it comes to packaging a GitHub-hosted application, things are not that simple when the author has not explicitly tagged a specific release.