From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Mike Ralphson" <mike.ralphson@gmail.com>
Subject: Re: How are the same file modified on different brances stored physically?
Date: Mon, 3 Mar 2008 09:36:46 +0000
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References: <15799383.post@talk.nabble.com>
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To: amishera <amishera2007@gmail.com>
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On 03/03/2008, amishera <amishera2007@gmail.com> wrote:
>  I am trying to figure out how stuffs work behind the scene. We know that we
>  can switch branches freely and then work on the switched branch. If the same
>  file is modified on two branches then how are the two copies of the two
>  branches saved?

http://eagain.net/articles/git-for-computer-scientists/

May help explain the inner workings.