umbing">plumbing</a>.</p>
</dd>
<dt class="hdlist1"><a id="def_per_worktree_ref"></a>per-worktree ref</dt>
<dd>
<p>Refs that are per-<a href="#def_working_tree">worktree</a>, rather than
global.  This is presently only <a href="#def_HEAD">HEAD</a> and any refs
that start with <code>refs/bisect/</code>, but might later include other
unusual refs.</p>
</dd>
<dt class="hdlist1"><a id="def_pseudoref"></a>pseudoref</dt>
<dd>
<p>Pseudorefs are a class of files under <code>$GIT_DIR</code> which behave
like refs fo