$ git clone -n https://src.fedoraproject.org/rpms/octave-signal.git /var/lib/mock/f41-build-side-1-2965691-35796/root/chroot_tmpdir/scmroot/octave-signal
Cloning into '/var/lib/mock/f41-build-side-1-2965691-35796/root/chroot_tmpdir/scmroot/octave-signal'...
$ git fetch origin 56fd22600d66d4d44039aa85096fef5d139d3ff6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-signal
 * [new ref]         56fd22600d66d4d44039aa85096fef5d139d3ff6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 56fd226 convert GPLv3+ license to SPDX