$ git clone -n https://src.fedoraproject.org/rpms/R-R.utils.git /var/lib/mock/f40-build-2270410-54814/root/chroot_tmpdir/scmroot/R-R.utils
Cloning into '/var/lib/mock/f40-build-2270410-54814/root/chroot_tmpdir/scmroot/R-R.utils'...
$ git fetch origin b897a0b137cb8ada690e10d72b3378f19b538e92:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-R.utils
 * [new ref]         b897a0b137cb8ada690e10d72b3378f19b538e92 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b897a0b Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild