git.xsh

import itertools
import operator

get_branches = lambda: [branch[1:].strip() for branch in $(git branch --list).split('\n') if branch]
get_remotes = lambda: dict((k, set(v[1] for v in group)) for k, group in itertools.groupby(branch.split('->')[0].split('/') for branch in $(git branch -r).split(), operator.itemgetter(0)) if k)