<a href="#def_head_ref">head ref</a> from a remote
<a href="#def_repository">repository</a>, to find out which objects are
missing from the local <a href="#def_object_database">object database</a>,
and to get them, too.  See also <a href="git-fetch.html">git-fetch(1)</a>.</p>
</dd>
<dt class="hdlist1"><a id="def_file_system"></a>file system</dt>
<dd>
<p>Linus Torvalds originally designed Git to be a user space file system,
i.e. the infrastructure to hold files and directories. That ensured the
efficiency an