Git blame only current branch

From: Stephen Bash <bash@genarts.com>
Date: Dec 12, 2011, 15:24 UTC
Message-ID: <d615954f-bed8-482d-a2e3-e1e741d6dd23@mail>
In-Reply-To: <e9e35956-a091-4143-8fd4-3516b54263a6@mail>

Hi all-

I'm curious if there's a method to make git blame merge commits that introduce code to the given branch rather than commits on the original (topic) branch?  For example:

  A--B--C---M--D  master
   \       /
    1--2--3       topicA

I'd like a mode where 'git blame master ...' shows commit M for lines changed by topicA so I can easily do 'git blame M^ ...' to see changes (on master) prior to the merge of topicA.  Unfortunately 'git blame master ^topicA ...' blames all the changes of topicA to 3 (which reading the docs appears to be the "correct" behavior).

Thanks!

Stephen