$ git clone -n https://src.fedoraproject.org/rpms/debhelper.git /var/lib/mock/f40-build-1512619-23909/root/chroot_tmpdir/scmroot/debhelper
Cloning into '/var/lib/mock/f40-build-1512619-23909/root/chroot_tmpdir/scmroot/debhelper'...
$ git fetch origin ddbdbbd3bde6451d846be5743c9daa68a241ac1f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/debhelper
 * [new ref]         ddbdbbd3bde6451d846be5743c9daa68a241ac1f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ddbdbbd Configure Packit for release automation