There is no hint in docs, that message string can be used in policies.
Metadata Update from @tkopecek: - Issue tagged with: doc
Metadata Update from @tkopecek: - Issue set to the milestone: 1.17
PR #1229
Commit e143da90 fixes this issue
Commit 9162793d fixes this issue
This issue has been migrated to Fedora Forge: https://forge.fedoraproject.org/koji/koji/issues/1228
Please continue any further discussion there.