Just for awareness : I noticed this morning through monitoring that the cache/proxy used by kojid builders (needed to reach out to gitlab/etc) was down during the night, so while kojihub itself was available, the kojid nodes weren't even checking in.
I quickly reconfigured (with ansible) another caching proxy and so restored connectivity. If you noticed some build issues during some hours, please resubmit these, but it seems most were just queued and so picked up "normally" as soon as connection was restored.