From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ulrik Sverdrup <ulrik.sverdrup@gmail.com>
Subject: Re: Parent-less branches
Date: Sat, 3 May 2008 01:20:10 +0200
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> I wanted to do this just the other day, but I did it all inside the  
> one repo, and made some notes on the process here:
> 
> http://rails.wincent.com/wiki/Creating_independent_branches_with_Git
> 
> Basically, using "git write-tree" and "git commit-tree" plumbing.
> 
> Cheers,
> Wincent

I think I've seen this done much simpler, in this blog post:

http://madduck.net/blog/2007.07.11:creating-a-git-branch-without-ancestry/

Even though your instructions seem more complicated than they are since
they mix setting up the parentless branch and preparing the first
commit content.

regards,
ulrik

(I am not on the list, please CC)