Let's use get_tag_id and allow buildTag value as string and dict.
PR 3550
Metadata Update from @jcupova: - Custom field Size adjusted to None
Metadata Update from @tkopecek: - Issue tagged with: testing-ready
Metadata Update from @jcupova: - Issue tagged with: testing-done
Commit 2f3e3525 fixes this issue
Commit 3a2894f0 fixes this issue
This issue has been migrated to Fedora Forge: https://forge.fedoraproject.org/koji/koji/issues/3549
Please continue any further discussion there.