This script outputs the sum of the git changes you made today.

todays_git_stats

#!/usr/bin/env ruby

changed_files = insertions = deletions = 0

lines = `git log --since="0am" --stat` 
lines.each_line do |line|
  if line =~ /(\d+) files changed, (\d+) insertions\(\+\), (\d+) deletions\(-\)/   
    changed_files += $1.to_i
    insertions    += $2.to_i
    deletions     += $3.to_i
  end
end

branch = `git name-rev --name-only HEAD` 
puts "Today you made the following changes on the branch '#{branch.chomp}':"
puts "#{changed_files} files changed, #{insertions} insertions(+), #{deletions} deletions(-)"