From mboxrd@z Thu Jan  1 00:00:00 1970
From: Junio C Hamano <gitster@pobox.com>
Subject: Re: Why do some commits not appear in "git log"?
Date: Wed, 03 Aug 2011 11:57:35 -0700
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Cc: Michael Witten <mfwitten@gmail.com>, git@vger.kernel.org
To: Dov Grobgeld <dov.grobgeld@gmail.com>
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In-Reply-To: <CA++fsGGhzVkXTPLui+DfTFcjve7w80Kud4RxC0p=5AenOcBSDw@mail.gmail.com> (Dov
 Grobgeld's message of "Wed, 3 Aug 2011 08:47:46 +0300")
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Dov Grobgeld <dov.grobgeld@gmail.com> writes:

> --full-history indeed made the missing commits show up! So why was the
> commit pruned? It contains some substantial source changes...

I suspect that these "substantial changes" did not make any contribution
to the end result. Read

http://thread.gmane.org/gmane.comp.version-control.git/89400/focus=90659

These days, the --post-simplify option implemented in that discussion
thread is called --simplify-merges or something, I think.