$ git clone -n https://src.fedoraproject.org/rpms/zmat.git /var/lib/mock/f40-build-807231-145185/root/chroot_tmpdir/scmroot/zmat
Cloning into '/var/lib/mock/f40-build-807231-145185/root/chroot_tmpdir/scmroot/zmat'...
$ git fetch origin 8a61cec86af6b3507458602d6d6001ebb79a4df8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zmat
 * [new ref]         8a61cec86af6b3507458602d6d6001ebb79a4df8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a61cec Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild