Finding the name of the parent branch?

From: Pascal Obry <pascal@obry.net>
Date: Jan 30, 2009, 10:56 UTC
Message-ID: <a2633edd0901300256k2ad7530elcaca5cdc30c17534@mail.gmail.com>

I want to find the name of the parent branch in a script. What is the best way?

                         o---o---o---C
                         /
                    o---o---o---B
                   /
           ---o---o---o---o---o---A

For B I want to get A and for C I want to get B.

All this can be found in gitk, but from a script I did not found a good solution.

Any idea?

Thanks. Pascal.

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