git rebase request on a project

[Paulo César Pereira de Andrade]

  Sorry if this is a dumb question, but I cannot find any information.

  I would like to have "git rebase master" on f16, f17, and f18
branches of  http://pkgs.fedoraproject.org/cgit/megaglest.git
I once messed it a bit by adding a commit only to branches and
later merging master, now I cannot merge without a "merge master"
commit, and am not allowed to push myself a "git rebase master"
branch.

Thanks,
Paulo