$ git clone -n https://src.fedoraproject.org/rpms/octave-quaternion.git /var/lib/mock/f41-build-side-1-2965727-35796/root/chroot_tmpdir/scmroot/octave-quaternion
Cloning into '/var/lib/mock/f41-build-side-1-2965727-35796/root/chroot_tmpdir/scmroot/octave-quaternion'...
$ git fetch origin 8afbbc7f0e18b89ac2bd479c50c2a4ad2c5c19eb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-quaternion
 * [new ref]         8afbbc7f0e18b89ac2bd479c50c2a4ad2c5c19eb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8afbbc7 convert GPLv3+ license to SPDX