$ git clone -n https://src.fedoraproject.org/rpms/kf5-knewstuff.git /var/lib/mock/f41-build-809575-146297/root/chroot_tmpdir/scmroot/kf5-knewstuff
Cloning into '/var/lib/mock/f41-build-809575-146297/root/chroot_tmpdir/scmroot/kf5-knewstuff'...
$ git fetch origin d6497324a1c8c7ef9d1b952622508b6f98e819e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-knewstuff
 * [new ref]         d6497324a1c8c7ef9d1b952622508b6f98e819e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d649732 5.116.0