$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-mapclass.git /var/lib/mock/f39-build-1585611-38146/root/chroot_tmpdir/scmroot/gap-pkg-mapclass
Cloning into '/var/lib/mock/f39-build-1585611-38146/root/chroot_tmpdir/scmroot/gap-pkg-mapclass'...
$ git fetch origin 65f4a30dd017027fe751863bd5e096dcecdcbde3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-mapclass
 * [new ref]         65f4a30dd017027fe751863bd5e096dcecdcbde3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 65f4a30 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild