$ git clone -n https://src.fedoraproject.org/rpms/lxshortcut.git /var/lib/mock/f45-build-17887-505/root/chroot_tmpdir/scmroot/lxshortcut
Cloning into '/var/lib/mock/f45-build-17887-505/root/chroot_tmpdir/scmroot/lxshortcut'...
$ git fetch origin b4242dddac00a0382096ab92b36eb123d3244830:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lxshortcut
 * [new ref]         b4242dddac00a0382096ab92b36eb123d3244830 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b4242dd Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild