$ git clone -n https://src.fedoraproject.org/rpms/mat2.git /var/lib/mock/f40-build-2517434-61730/root/chroot_tmpdir/scmroot/mat2
Cloning into '/var/lib/mock/f40-build-2517434-61730/root/chroot_tmpdir/scmroot/mat2'...
$ git fetch origin d59c57e696d4297f2595cdc8bfc0b364f64be853:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mat2
 * [new ref]         d59c57e696d4297f2595cdc8bfc0b364f64be853 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d59c57e Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild