a unique
prefix with at least <code>length</code> characters. The minimum length
is 4, the default is the effective value of the <code>core.abbrev</code>
configuration variable (see <a href="git-config.html">git-config(1)</a>).</p>
</dd>
<dt class="hdlist1">--not</dt>
<dd>
<p>When showing object names, prefix them with <em>^</em> and
strip <em>^</em> prefix from the object names that already have
one.</p>
</dd>
<dt class="hdlist1">--abbrev-ref[=(strict|loose)]</dt>
<dd>
<p>A non-ambiguous short name of the 