Add below code to the file `~/.bashrc`

# this will file recent 10 branches
alias recent_branches="git for-each-ref --sort='-authordate:iso8601' --format='%(refname:short)' --count 10  refs/heads"

function recent() {
  read -a arr <<< $(recent_branches)

  for ((i = 0; i < ${#arr[@]}; ++i)); do
      position=$(($i))
      echo "$position ${arr[$i]}"
  done
}

# checkout to branch with index num
function gckp() {
  arr=($(recent_branches))
  git checkout ${arr[$@]}
}