v>
<div class="paragraph">
<p><em>git archive</em> behaves differently when given a tree ID as opposed to a
commit ID or tag ID. When a tree ID is provided, the current time is
used as the modification time of each file in the archive. On the
other hand, when a commit ID or tag ID is provided, the commit time as
recorded in the referenced commit object is used instead.
Additionally the commit ID is stored in a global extended pax header
if the tar format is used; it can be extracted using <em>git
get-tar-co