We have priority support in action queue now, but there's no priority setup for actions. We should add something, because otherwise the initial builds in freshly created projects can fail:

copr create test-project --chroot fedora-rawhide-x86_64 # triggers createrepo action
copr build test-project my.src.rpm # starts faster than previous action gets processed

That's because 5df340e; usually, if there's small action queue -- the initial action is going to be processed very fast, and https://infrastructure.fedoraproject.org/cgit/ansible.git/commit/?id=37b6c9f2e512f964ebb6130bf0921e216e17fe70 will save use. But with larger queue, the initial build may fail for a long time.

IOW, the "initial createrepo" action should have very high priority, it is prompt action anyways (createrepo on empty directory is for free..).