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From: Junio C Hamano <junkio@cox.net>
Subject: Re: openbsd version?
Date: Mon, 10 Oct 2005 13:30:15 -0700
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To: merlyn@stonehenge.com (Randal L. Schwartz)
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merlyn@stonehenge.com (Randal L. Schwartz) writes:

> Related question.  I created "mybranch" to do the patch, but how
> can I have my repository now forget that mybranch was ever made?
> Is it sufficient to remove the branch link, and then type some "fsck"
> operation?

Removing non-current branch -- you may need to do -D instead of -d. 

$ git branch -d mybranch

> That's also a question in general... how can I remove a commit,
> knowing that I'd never refer to it again?  Or is disk space so cheap
> that it wouldn't make any difference anyway?

Removing from the tip of the current branch:

$ git reset HEAD^

Removing from the tip of non-current branch:

$ git update-ref mybranch mybranch^