$ git clone -n https://src.fedoraproject.org/rpms/R-mAr.git /var/lib/mock/f40-build-2321772-58607/root/chroot_tmpdir/scmroot/R-mAr
Cloning into '/var/lib/mock/f40-build-2321772-58607/root/chroot_tmpdir/scmroot/R-mAr'...
$ git fetch origin 4f83f1340fbca56970b1a3c8fb0b470ceb81969d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-mAr
 * [new ref]         4f83f1340fbca56970b1a3c8fb0b470ceb81969d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f83f13 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild