It seems, that all dependencies were finally converted to py3. Let's try to get it working now.
Last non py3 dependency is euca2ools needed by the EC2 imagefactory plugin.
Metadata Update from @breilly: - Custom field Size adjusted to None
Metadata Update from @tkopecek: - Issue close_status updated to: Fixed - Issue status updated to: Closed (was: Open)
This issue has been migrated to Fedora Forge: https://forge.fedoraproject.org/koji/koji/issues/1764
Please continue any further discussion there.