$ git clone -n https://src.fedoraproject.org/rpms/openscad.git /var/lib/mock/f39-build-1601206-38557/root/chroot_tmpdir/scmroot/openscad
Cloning into '/var/lib/mock/f39-build-1601206-38557/root/chroot_tmpdir/scmroot/openscad'...
$ git fetch origin 2554fa47a8d3e16cb116eeaa9a733fe23a833b7e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openscad
 * [new ref]         2554fa47a8d3e16cb116eeaa9a733fe23a833b7e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2554fa4 Enable SpaceNav support