app/soc/templates/modules/gsoc/header.html

<div id="page-header">
  <div class="container_12">
    <div class="grid_12">
        <div id="gci">
          <a href="{{ gci_link }}">Looking for Google Code-in? Click here!</a>
        </div>
        <a href="{{ home_link }}"><img src="/soc/content/{{ app_version }}/images/gsoc/logo/banner-{{ program_link_id }}.png" width="924" height="156" alt="Google Summer of Code" /></a>
    </div>
  </div>
</div>
<!-- .page-header -->