Some things were not merged correctly with py3 changes, some more are needed for full-support.
Metadata Update from @tkopecek: - Issue set to the milestone: 1.17
PR #1265
Commit 4f45ccee fixes this issue
This issue has been migrated to Fedora Forge: https://forge.fedoraproject.org/koji/koji/issues/1264
Please continue any further discussion there.