$ git clone -n https://src.fedoraproject.org/rpms/xar.git /var/lib/mock/f40-build-788528-135185/root/chroot_tmpdir/scmroot/xar
Cloning into '/var/lib/mock/f40-build-788528-135185/root/chroot_tmpdir/scmroot/xar'...
$ git fetch origin 3302dd913596da29162e4b7e8862f24c8a0e34c5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xar
 * [new ref]         3302dd913596da29162e4b7e8862f24c8a0e34c5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3302dd9 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild