line: 5763
if hasattr(hub_opts, 'optional_arches'): hub_opts['optional_arches'] = hub_opts['optional_arches'].split(',')
hub_opts is a dictionary, hasattr() does not work for checking key existence.
PR #743
Metadata Update from @tkopecek: - Issue set to the milestone: 1.16
Commit 3c8d5ee3 fixes this issue
Commit fce85a67 fixes this issue
This issue has been migrated to Fedora Forge: https://forge.fedoraproject.org/koji/koji/issues/742
Please continue any further discussion there.