There's more logic involved in CVSTag, but for now, just prevent the writer from outputting anything, I can kill the remaining logic later.
Index: TrackFile.pm =================================================================== RCS file: /cvs/ports/infrastructure/lib/OpenBSD/TrackFile.pm,v retrieving revision 1.3 diff -u -p -r1.3 TrackFile.pm --- TrackFile.pm 13 Feb 2022 17:42:28 -0000 1.3 +++ TrackFile.pm 28 Feb 2022 18:09:03 -0000 @@ -359,5 +359,10 @@ sub prepare_backsubst } } +package OpenBSD::PackingElement::CVSTag; +sub prepare_restate +{ + undef; +} 1;