$ git clone -n https://src.fedoraproject.org/rpms/chatty.git /var/lib/mock/f40-build-2164676-50972/root/chroot_tmpdir/scmroot/chatty
Cloning into '/var/lib/mock/f40-build-2164676-50972/root/chroot_tmpdir/scmroot/chatty'...
$ git fetch origin afed8117a85cbced37b19332f6815fac21418a0e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/chatty
 * [new ref]         afed8117a85cbced37b19332f6815fac21418a0e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at afed811 Don't run tests in parallel