$ git clone -n https://src.fedoraproject.org/rpms/speech-dispatcher.git /var/lib/mock/f42-build-side-1-3537114-46559/root/chroot_tmpdir/scmroot/speech-dispatcher
Cloning into '/var/lib/mock/f42-build-side-1-3537114-46559/root/chroot_tmpdir/scmroot/speech-dispatcher'...
$ git fetch origin a33d72e1530715d75e42dcd22d68edda912ac7e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/speech-dispatcher
 * [new ref]         a33d72e1530715d75e42dcd22d68edda912ac7e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a33d72e 0.12.1