#!/bin/bash

if [ ! -d .git ]; then
	echo Does not appear to be a git tree
	exit 1
fi

if [ "$1"x == x ]; then
	echo Need remote branch
	exit 1
fi

SRC=$1

if [ ! -f .git/refs/remotes/origin/$SRC ]; then
	echo Remote branch $SRC does not exist
	exit 2
fi

if [ "$2"x != x ]; then
	DST=$2
else
	DST=$SRC
fi

cp .git/refs/remotes/origin/$SRC .git/refs/heads/$DST