$ git clone -n https://src.fedoraproject.org/rpms/lxdm.git /var/lib/mock/f40-build-763256-122453/root/chroot_tmpdir/scmroot/lxdm
Cloning into '/var/lib/mock/f40-build-763256-122453/root/chroot_tmpdir/scmroot/lxdm'...
$ git fetch origin 54202fc580dbe1f168b5439f0ebb379929bbd20d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lxdm
 * [new ref]         54202fc580dbe1f168b5439f0ebb379929bbd20d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 54202fc use new patch style