Git responses are usually very straightforward and to the point, but today I got git to say “Yeah!” by telling it to merge something it just merged. To get your git to be a little silly too:

Immediately after doing a merge, look at that last merge commit

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$ git log -n1

commit 76c4ac19c545fdc9d20c43beb358c47c0d84185a
Merge: 2619f49 0f71f1f
Author: someone@somewhere.com
Date:   Fri Jun 17 17:36:10 2011 -0700

[master] Merge branch 'release'

Then…tell git to merge the same two SHA’s again

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$ git merge 2619f49 0f71f1f
Already up-to-date. Yeeah!

This is using git v1.7.5.4 command line, on OSX.