For an unknown reason this https://koji.fedoraproject.org/koji/buildinfo?buildID=1285489 build task in Koji dead-locked on tagging the build. Please kill the task.
This is showing as canceled to me... where are you seeing it dead-locked?
After canceling parental MBS task and verifying the MBS task transitioned into canceled state the RPM build remained in an active state. Thus I reported it here. It's possible the cancel event was delayed somewhere.
Metadata Update from @ppisar: - Issue close_status updated to: Invalid - Issue status updated to: Closed (was: Open)