This script updates all the branches, like running pull on every local branch

pull-all-branches.sh

#!/bin/bash
cd $1
declare -a BRANCHES=(`git for-each-ref --format='%(refname:short)' refs/heads/`)
CURRENT=(`git rev-parse --abbrev-ref HEAD`)
for BRANCH in "${BRANCHES[@]}"
do
    if [ "$CURRENT" = "$BRANCH" ]
    then
        git pull
    else
        git fetch origin "$BRANCH":"$BRANCH"
    fi
done