 blank line.
Outputs a single blank line when all fetch commands in the
same batch are complete. Only objects which were reported
in the output of <em>list</em> with a sha1 may be fetched this way.</p>
<div class="paragraph">
<p>Optionally may output a <em>lock &lt;file&gt;</em> line indicating the full path of
a file under <code>$GIT_DIR/objects/pack</code> which is keeping a pack until
refs can be suitably updated.  The path must end with <code>.keep</code>. This is
a mechanism to name a &lt;pack,idx,keep