$ git clone -n https://src.fedoraproject.org/rpms/octave-metch.git /var/lib/mock/f41-build-side-1-2969499-35819/root/chroot_tmpdir/scmroot/octave-metch
Cloning into '/var/lib/mock/f41-build-side-1-2969499-35819/root/chroot_tmpdir/scmroot/octave-metch'...
$ git fetch origin 8a69457765932a6549fce92806f2ee4f62fe45f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-metch
 * [new ref]         8a69457765932a6549fce92806f2ee4f62fe45f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a69457 convert GPLv2+ license to SPDX