$ git clone -n https://src.fedoraproject.org/rpms/rubber.git /var/lib/mock/f40-build-2322389-58653/root/chroot_tmpdir/scmroot/rubber
Cloning into '/var/lib/mock/f40-build-2322389-58653/root/chroot_tmpdir/scmroot/rubber'...
$ git fetch origin 6eab361329e27f7f7e172b3c81fc77afd5ee0afe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubber
 * [new ref]         6eab361329e27f7f7e172b3c81fc77afd5ee0afe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6eab361 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild