Lots of repos? Try "git-pull-recursive" to run "git pull" on all subfolders with a .git folder inside. Thanks to http://snipplr.com/view/62314/perform-git-pull-on-subdirectory-recursive/

git-pull-recursive.rb

# For use in Chef:
# Adds a command: git-pull-recursive
file "/usr/local/bin/git-pull-recursive" do
  owner "root"
  group "root"
  mode "0755"
  action :create
  content 'find . -type d -name .git -exec sh -c "cd \"{}\"/../ && pwd && git pull" \;'
end

git-pull-recursive.sh

# For use in a shell:
# Download this file to /usr/local/bin/git-pull-recursive, then chmod 755 it to install git-pull-recursive
find . -type d -name .git -exec sh -c "cd \"{}\"/../ && pwd && git pull" \;