$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-genss.git /var/lib/mock/f39-build-1507934-35320/root/chroot_tmpdir/scmroot/gap-pkg-genss
Cloning into '/var/lib/mock/f39-build-1507934-35320/root/chroot_tmpdir/scmroot/gap-pkg-genss'...
$ git fetch origin ec63c38e9685ab22a7b5baad48c12c9b1476387d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-genss
 * [new ref]         ec63c38e9685ab22a7b5baad48c12c9b1476387d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec63c38 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild