The pkgdb currently has the ability to automatically monitor for new
upstream releases and attempt scratch builds in Koji when they're
published. "rebase-helper" was recently integrated into that so the
automated rebuilds are more likely to succeed.

Another new feature recently added was pinging all of the package
watchers every time Anitya detected a new build, but automatic BZ
filing and scratch builds were disabled :)

Would it be worth trying turning that on for these packages? I'd also
be happy to finally start down the path towards co-maintainership if
that would tip the answer towards "Yes" :)