branches() {
  git branch | sed -e 's/*/ /g' | egrep -v '^[[:space:]]+master$' | awk '{print
$NF}'
}

last_commit() {
  git log -n 1 "${1}" | grep commit | awk '{print $2}'
}

branch_is_merged() {
  git log master | grep "commit $(last_commit "${1}")" > /dev/null 2>&1
}
unmerged() {
  for branch in $(branches)
  do
    branch_is_merged "${branch}" || echo "${branch}"
  done
}