capability allows the server to return "ACK obj-id
continue" as soon as it finds a commit that it can use as a common
base, between the client&#8217;s wants and the client&#8217;s have set.</p>
</div>
<div class="paragraph">
<p>By sending this early, the server can potentially head off the client
from walking any further down that particular branch of the client&#8217;s
repository history.  The client may still need to walk down other
branches, sending have lines for those, until the server has a
complete c