File _servicedata of Package read-only-root-fs

<servicedata>
  <service name="tar_scm">
    <param name="url">git://github.com/openSUSE/read-only-root-fs.git</param>
    <param name="changesrevision">586e9f1b5ac3cf35a00e21f75f1bc3874b952025</param>
 </service>
</servicedata>