$ git clone -n https://src.fedoraproject.org/rpms/octave-image.git /var/lib/mock/f41-build-side-1-2969483-35819/root/chroot_tmpdir/scmroot/octave-image
Cloning into '/var/lib/mock/f41-build-side-1-2969483-35819/root/chroot_tmpdir/scmroot/octave-image'...
$ git fetch origin b8f864d2cecb094ccfd94b8033e55448d82ba9cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-image
 * [new ref]         b8f864d2cecb094ccfd94b8033e55448d82ba9cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b8f864d convert GPLv2+ license to SPDX