$ git clone -n https://src.fedoraproject.org/rpms/brise.git /var/lib/mock/f39-build-1489685-34501/root/chroot_tmpdir/scmroot/brise
Cloning into '/var/lib/mock/f39-build-1489685-34501/root/chroot_tmpdir/scmroot/brise'...
$ git fetch origin b2159421757cd8566bd7cdf6bfb6da9319a883e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/brise
 * [new ref]         b2159421757cd8566bd7cdf6bfb6da9319a883e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b215942 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild