[RFE] allow git bisect to figure out in which revision a bug was fixed

Hi,

As a distro kernel grunt, I sometimes find myself in the situation of
having to track down the commit that fixed a given problem so that I can
backport it to an older kernel.  Sometimes I'm smart enough to figure it
out myself, other times I'm not.  ;-)  It would be helpful if git bisect
could help figure out in what commit a bug was fixed as opposed to
introduced.  Is there any interest in implementing such a feature?

Thanks,
Jeff