$ git clone -n https://src.fedoraproject.org/rpms/greetd.git /var/lib/mock/f45-build-39703-750/root/chroot_tmpdir/scmroot/greetd
Cloning into '/var/lib/mock/f45-build-39703-750/root/chroot_tmpdir/scmroot/greetd'...
$ git fetch origin fe1afafee09f2f26cde5a61635f4e67e7642346b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/greetd
 * [new ref]         fe1afafee09f2f26cde5a61635f4e67e7642346b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fe1afaf Add comments for kmscon patch