File _servicedata of Package gn.openSUSE_Backports_SLE-15-SP6_Update

<servicedata>
<service name="tar_scm">
                <param name="url">https://gn.googlesource.com/gn.git</param>
              <param name="changesrevision">97b68a0bb62b7528bc3491c7949d6804223c2b82</param></service></servicedata>