From mboxrd@z Thu Jan  1 00:00:00 1970
From: Junio C Hamano <gitster@pobox.com>
Subject: Re: ref name troubles, was Re: [PATCH v2] Introduce %<branch> as
 shortcut to the tracked branch
Date: Thu, 19 Mar 2009 23:57:42 -0700
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Cc: "Shawn O. Pearce" <spearce@spearce.org>,
	Johannes Schindelin <Johannes.Schindelin@gmx.de>,
	Petr Baudis <pasky@suse.cz>,
	Andreas Gruenbacher <agruen@suse.de>, git@vger.kernel.org
To: Jeff King <peff@peff.net>
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Jeff King <peff@peff.net> writes:

> On Thu, Mar 19, 2009 at 05:40:29PM -0700, Shawn O. Pearce wrote:
>
>> So yea, you can create a branch named "foo@{1}".
>
> But you can't actually refer to it:
>
>   $ git branch foo@{1}
>   $ git show foo@{1} --
>   fatal: bad revision 'foo@{1}'
>
> which implies that nobody is actually using it for anything.

I think you are right.  It is just "git branch" and perhaps "git
update-ref" are too loose in enforcing what can be created.