#!/usr/local/bin/bash

str="/$*/"
str=$(echo "$str" | sed 's/ /\/ \&\& \//g')
str="print if $str"
res=$(git branch --all | perl -ne "$str")
res=$(echo $res | tr ' ' '\n' | cut -d/ -f3-)
matches=$(echo $res | tr ' ' '\n' | uniq -u | wc -l)
if (( $matches == 1 )); then
  git checkout "$res"
else
  echo $res | tr ' ' '\n'
fi