$ git clone -n https://src.fedoraproject.org/rpms/octave-communications.git /var/lib/mock/f45-build-20857-574/root/chroot_tmpdir/scmroot/octave-communications
Cloning into '/var/lib/mock/f45-build-20857-574/root/chroot_tmpdir/scmroot/octave-communications'...
$ git fetch origin 4c883981ac1f795a437d369efebc4429db356b2d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-communications
 * [new ref]         4c883981ac1f795a437d369efebc4429db356b2d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c88398 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild