$ git clone -n https://src.fedoraproject.org/rpms/nwg-panel.git /var/lib/mock/f41-build-side-1-2752253-31164/root/chroot_tmpdir/scmroot/nwg-panel
Cloning into '/var/lib/mock/f41-build-side-1-2752253-31164/root/chroot_tmpdir/scmroot/nwg-panel'...
$ git fetch origin 4f450a04d30d9195b11d7b33bc3ba4b293d2f35d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nwg-panel
 * [new ref]         4f450a04d30d9195b11d7b33bc3ba4b293d2f35d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f450a0 Update to 0.9.39 upstream release