$ git clone -n https://src.fedoraproject.org/rpms/ghasher.git /var/lib/mock/f40-build-1997644-44161/root/chroot_tmpdir/scmroot/ghasher
Cloning into '/var/lib/mock/f40-build-1997644-44161/root/chroot_tmpdir/scmroot/ghasher'...
$ git fetch origin d2cd7dbc899b121a747d385c069a4f137f976a33:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghasher
 * [new ref]         d2cd7dbc899b121a747d385c069a4f137f976a33 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2cd7db Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild