From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paul Mackerras <paulus@samba.org>
Subject: Re: --ignore-invalid flag to git log et al.?
Date: Wed, 11 Jul 2007 19:07:32 +1000
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Cc: "Junio C Hamano" <gitster@pobox.com>, git@vger.kernel.org
To: "Alex Riesen" <raa.lkml@gmail.com>
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Alex Riesen writes:

> git rev-parse --revs-only ref1 ref2 ref3 ...?

That stops when it sees an invalid ref and doesn't check the rest.
Also if you give it a string of 40 hex digits it will print it out
whether it's a valid object ID or not.

Paul.