From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alex Riesen <raa.lkml@gmail.com>
Subject: Re: Merging repositories and their histories
Date: Mon, 18 Aug 2008 19:35:11 +0200
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To: Peter Waller <peter.waller@gmail.com>
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Peter Waller, Mon, Aug 18, 2008 18:46:14 +0200:
> 
> I have three repositories, A, B and C. I wish to bring them together to only
> one repository (.), where they are in a directory called ./Archive, so..
> ./Archive/{A,B,C}. Then I plan at a later date to move files arbitrarily
> from ./Archive/{A/B/C}/Something and into ./Something{A/B/C}. (A lame
> example, but illustrates what I want to do).

If this transition is meant to be persistent (IOW, the A, B and C stop
existing as repos on their own) you can rewrite their histories to be
in the directories (with git filter-branch) and just merge them in
one. Then the histories will look like as if they have never grown
separately.