$ git clone -n https://src.fedoraproject.org/rpms/rear.git /var/lib/mock/f41-build-1034539-18640/root/chroot_tmpdir/scmroot/rear
Cloning into '/var/lib/mock/f41-build-1034539-18640/root/chroot_tmpdir/scmroot/rear'...
$ git fetch origin 0ff3a79b8a33b7809360273b975e52d440ffd9ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rear
 * [new ref]         0ff3a79b8a33b7809360273b975e52d440ffd9ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0ff3a79 Sync with patches in CentOS Stream 9