$ git clone -n https://src.fedoraproject.org/rpms/rpkg-macros.git /var/lib/mock/f38-build-side-42-init-devel-1139295-30410/root/chroot_tmpdir/scmroot/rpkg-macros
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1139295-30410/root/chroot_tmpdir/scmroot/rpkg-macros'...
$ git fetch origin 4c54a976931b46fc4c637a779064c7450f10d351:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rpkg-macros
 * [new ref]         4c54a976931b46fc4c637a779064c7450f10d351 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c54a97 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild