Put this in your path as `git-recent-branch` and you can do `git recent-branch` and `git recent-branch -r`

git-recent-branch.sh

#!/bin/bash

branches=`git branch $* | perl -pe 's/^..(.*?)( ->.*)?$/\1/'`

for k in $branches; do
  echo -e `git show --pretty=format:"%Cgreen%ci %Cblue%cr%Creset" $k -- |
    head -n 1`\\t$k
done | sort -r