This bit me when `git pull upstream blead' didn't pull commits I knew
had been commited, turned out GitHub's mirror was out of date.
The same patch as above, using github might look like this:
% cd perl-github
- % git remote add upstream git://github.com/github/perl.git
+ % git remote add upstream git://perl5.git.perl.org/perl.git
% git pull upstream blead
% git checkout -b orange
% perl -pi -e 's{Leon Brocard}{Orange Brocard}' AUTHORS