git grep with column and new files

grepprg.sh

#! /bin/bash

git --no-pager grep --no-color --no-index --exclude-standard -n $1 | while read git_grep; do

  file_and_line=$(echo "$git_grep" | cut -d : -f 1,2)
  match=$(echo "$git_grep" | sed 's/[^:]*:[^:]*:\(.*\)/\1/')
  column=$(echo "$match" | awk "{print index(\$0, \"$1\")}")

  echo "$file_and_line:$column:$match"
done