#!/usr/bin/env bash

export USAGE='<branch>
or: <remote> <branch>
'

# This is the recommended pattern from `man git-sh-setup`.
#
# shellcheck disable=SC1090
. "$(git --exec-path)/git-sh-setup"

set -euo pipefail

case "$#" in
    1)
        remote='origin'
        branch="$1"
        ;;
    2)
        remote="$1"
        branch="$2"
        ;;
    *) usage ;;
esac


# I often change the fetch refmap to only watch my development branches and
# permanent shared ones. Explicitly use a default-ish refmap to undo that and
# make this create a named local branch.
exec git fetch --refmap='+refs/heads/*:refs/remotes/origin/*' "${remote}" "${branch}:${branch}"