$ git clone -n https://src.fedoraproject.org/rpms/octave-signal.git /var/lib/mock/f40-build-2097310-50432/root/chroot_tmpdir/scmroot/octave-signal
Cloning into '/var/lib/mock/f40-build-2097310-50432/root/chroot_tmpdir/scmroot/octave-signal'...
$ git fetch origin 9eda07b2c358de3bb4e0156079b0f144f3c7ff35:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-signal
 * [new ref]         9eda07b2c358de3bb4e0156079b0f144f3c7ff35 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9eda07b package additional files