$ git clone -n https://src.fedoraproject.org/rpms/octave-signal.git /var/lib/mock/f45-build-20855-574/root/chroot_tmpdir/scmroot/octave-signal
Cloning into '/var/lib/mock/f45-build-20855-574/root/chroot_tmpdir/scmroot/octave-signal'...
$ git fetch origin 0a7808c0c0b18763d1852111892d3386ac2de161:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-signal
 * [new ref]         0a7808c0c0b18763d1852111892d3386ac2de161 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0a7808c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild