add git utccommit recommendation to git guide

i2p2www/pages/site/docs/applications/git.html

@@ -65,6 +65,14 @@ using the instructions on the home page.{%- endtrans %}</p>
 </figure>
 <h2 id="trans--fourth-attempt-a-clone--endtrans">{% trans -%}Fourth: Attempt a clone{%- endtrans %}</h2>
 <p>{% trans -%}Now your tunnel is all set up, you can attempt a clone over SSH.{%- endtrans %}</p>
+<p>{% trans -%}Git Privacy: Committing to git adds a timestamp to git commit messages, which may be configured to reflect your local time zone. To enforce the use of UTC for all commits, you are advised to use a git alias, such as: {%- endtrans %}
+<pre><code>git config --global alias.utccommit '!git commit --date="$(date --utc +%Y-%m-%dT%H:%M:%S%z)"'</code></pre>
+{% trans -%}which will allow you to substitute{%- endtrans %}
+<pre><code>git commit</code></pre>
+{% trans -%}for{%- endtrans %}
+<pre><code>git utccommit</code></pre>
+{% trans -%}in order to obscure your local time zone.{%- endtrans %}
+</p>
 <pre><code>GIT_SSH_COMMAND=&quot;ssh -p 7442&quot; \
     git clone git@127.0.0.1:i2p-developer/i2p.i2p</code></pre>
 <p>{% trans -%} You might get an error where the remote end hangs up unexpectedly. Unfortunately git still doesn’t support resumable cloning. Until it does, there are a couple fairly easy ways to handle this. The first and easiest is to try and clone to a shallow depth: {%- endtrans %}</p>