Rebase the current branch against origin/master

def rebase(config):
    """Rebase the current branch against origin/master"""
    repo = config.repo

    active_branch = repo.active_branch
    if active_branch.name == "master":
        error_out("You're already on the master branch.")
    active_branch_name = active_branch.name

    if repo.is_dirty():
        error_out(
            'Repo is "dirty". ({})'.format(
                ", ".join([repr(x.b_path) for x in repo.index.diff(None)])
            )
        )

    state = read(config.configfile)
    origin_name = state.get("ORIGIN_NAME", "origin")
    upstream_remote = None
    for remote in repo.remotes:
        if remote.name == origin_name:
            upstream_remote = remote
            break
    if not upstream_remote:
        error_out("No remote called {!r} found".format(origin_name))

    repo.heads.master.checkout()
    repo.remotes[origin_name].pull("master")

    repo.heads[active_branch_name].checkout()

    print(repo.git.rebase("master"))
    success_out("Rebased against {}/master".format(origin_name))
    info_out("If you wanto start interactive rebase run:\n\n\tgit rebase -i master\n")