$ git clone -n https://src.fedoraproject.org/rpms/giac.git /var/lib/mock/f40-build-2280139-55381/root/chroot_tmpdir/scmroot/giac
Cloning into '/var/lib/mock/f40-build-2280139-55381/root/chroot_tmpdir/scmroot/giac'...
$ git fetch origin 7ba7756fd266986d542a6aeae8961198e80d6d10:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/giac
 * [new ref]         7ba7756fd266986d542a6aeae8961198e80d6d10 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ba7756 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild