@psabata uncovered an issue where our underscore is causing issues in another system.
Let's replace it with "+" in the construction of the dist-tag.
Metadata Update from @ralph: - Issue assigned to ralph
Fixed by #651.
Commit 3382d187 fixes this issue
This issue has been migrated to Fedora Forge: https://forge.fedoraproject.org/koji/mbs/issues/650
Please continue any further discussion there.