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From:   Jacob Keller <jacob.keller@gmail.com>
Date:   Wed, 24 Aug 2016 13:48:30 -0700
Message-ID: <CA+P7+xpv--eA8rdgwGLRCucSpVD5X9LjiN3_3Oo9o4L0t5Uk9Q@mail.gmail.com>
Subject: Re: diff <commit> using 3-dot behavior
To:     Junio C Hamano <gitster@pobox.com>
Cc:     Robert Dailey <rcdailey.lists@gmail.com>, Git <git@vger.kernel.org>
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On Wed, Aug 24, 2016 at 9:22 AM, Junio C Hamano <gitster@pobox.com> wrote:
> The merge-base is to compute the point you forked your topic from
> the mainline.  So if you want to compare your current state in the
> index with the fork point, you'd do
>
>         git diff --cached $(git merge-base master topic)
>
> and comparing your working tree state would be
>
>         git diff --cached $(git merge-base master topic)
>

Those are both identical?

Thanks,
Jake