$ git clone -n https://src.fedoraproject.org/rpms/frr.git /var/lib/mock/f38-build-side-42-init-devel-703116-27088/root/chroot_tmpdir/scmroot/frr
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-703116-27088/root/chroot_tmpdir/scmroot/frr'...
$ git fetch origin 777829246b9bf2190623adf612cc4a6cd5421406:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/frr
 * [new ref]         777829246b9bf2190623adf612cc4a6cd5421406 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7778292 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild