From mboxrd@z Thu Jan  1 00:00:00 1970
From: Junio C Hamano <gitster@pobox.com>
Subject: Re: git submodule when submodule is not a clone of a repository
Date: Fri, 18 Jan 2008 15:26:42 -0800
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Cc: "Sergio Callegari" <sergio.callegari@gmail.com>,
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To: "Lars Hjemli" <hjemli@gmail.com>
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"Lars Hjemli" <hjemli@gmail.com> writes:

> Actually, we could (and probably should) teach git-submodule not to
> fetch if the requested SHA1 is already available in the submodule,..

I think that is a very sensible optimization.