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From: Will Palmer <wmpalmer@gmail.com>
Subject: Re: git tag's history
Date: Mon, 26 Jul 2010 14:36:07 +0100
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Cc: Mahesh Vaidya <forvaidya@gmail.com>, git@vger.kernel.org
To: David Aguilar <davvid@gmail.com>
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On Mon, 2010-07-26 at 02:36 -0700, David Aguilar wrote:
> He won't be able to push the tag unless he forcibly deletes your tag first.
> 
> Tags do not have history.  This is a non-technical problem.  If s/he's
> deleting your tags, it's a social problem.
> 

What about enabling the reflog on the shared bare repository?
Tags get changed. That's a fact. It's a necessity, no matter what the
theoretical model says. Sometimes there's a reason to replace a tag, and
when that happens there is sometimes a reason to hang on to the old
value. Pretending "it's a social issue" ignores reality, not the least
important aspect of which is "social issues happen. How do we avoid
losing information in a sane, scalable manner?"

Just an example of a tag which could stand to be updated, take a look
at: refs/tags/junio-gpg-pub  There's at least one thing in there which
is out of date.