gc and update all git repos located in current folder and subfolders.

updaterepos.sh

#!/bin/bash
function procgit {
	git count-objects -vH;
   echo
   
   git fetch --all
   echo
   git gc
   git count-objects -vH
   echo
}
export -f procgit

find "$(pwd)" -name .git -type d | while read d; do
   cd "$d/.."
   echo "$d"
   procsubmod
   git submodule foreach --recursive procgit
   cd "$OLDPWD"
   echo
   
done