Direct ancestors from commit to HEAD

From: Gonsolo <gonsolo@gmail.com>
Date: Sep 16, 2009, 14:01 UTC
Message-ID: <4AB0EFC0.8020005@googlemail.com>

Is there a way to see only the direct line of (merge) ancestors from patch to HEAD? Something like:

commit 0cb583fd2862f19ea88b02eb307d11c09e51e2f8
Merge: 723e9db... a2d1056...
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Tue Sep 15 10:01:16 2009 -0700

	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6

commit 88512935a24305fea7aecc9ba4d675869e97fc2a
Merge: 8a62bab... 6b26dea...
Author: David S. Miller <davem@davemloft.net>
Date:   Fri Aug 14 12:27:19 2009 -0700

	Merge branch 'master' of 
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6

commit edd7fc7003f31da48d06e215a93ea966a22c2a03
Author: Nick Kossifidis <mick@madwifi-project.org>
Date:   Mon Aug 10 03:29:02 2009 +0300

     ath5k: Wakeup fixes

Here I can see exactly how the ath5k patch came to mainline and since when it is there.