$ git clone -n https://src.fedoraproject.org/rpms/lua-loop.git /var/lib/mock/f45-build-17659-502/root/chroot_tmpdir/scmroot/lua-loop
Cloning into '/var/lib/mock/f45-build-17659-502/root/chroot_tmpdir/scmroot/lua-loop'...
$ git fetch origin 7d72fb4dbe84f0ecfb8717d45fd356b14fd0969a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lua-loop
 * [new ref]         7d72fb4dbe84f0ecfb8717d45fd356b14fd0969a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d72fb4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild