$ git clone -n https://src.fedoraproject.org/rpms/qjson.git /var/lib/mock/f41-build-side-1-2768794-32099/root/chroot_tmpdir/scmroot/qjson
Cloning into '/var/lib/mock/f41-build-side-1-2768794-32099/root/chroot_tmpdir/scmroot/qjson'...
$ git fetch origin c0d9286742fab97478a705d2238cef13355353d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qjson
 * [new ref]         c0d9286742fab97478a705d2238cef13355353d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c0d9286 convert GPLv2+ license to SPDX