$ git clone -n https://src.fedoraproject.org/rpms/luajit.git /var/lib/mock/f41-build-696652-12816/root/chroot_tmpdir/scmroot/luajit
Cloning into '/var/lib/mock/f41-build-696652-12816/root/chroot_tmpdir/scmroot/luajit'...
$ git fetch origin a2b9554e9f8de0195a332cb0e7435a7addf5e93e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/luajit
 * [new ref]         a2b9554e9f8de0195a332cb0e7435a7addf5e93e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a2b9554 Update to verion 2.1.1713773202