snapshot-hook.sh

# Create the directory and make sure 
mkdir -p ~/.git-template/hooks

# Create a post-commit file in that directory and feed it the commit-hook:
cat > ~/.git-template/hooks/post-commit << EOF
#!/usr/bin/env ruby
file="~/.gitshots/#{Time.now.to_i}.jpg"
unless File.directory?(File.expand_path("../../rebase-merge", __FILE__))
  puts "Taking capture into #{file}!"
  system "imagesnap -q -w 3 #{file} &"
end
exit 0
EOF

# Make it executable
chmod o+x ~/.git-template/hooks/post-commit

# Finally, "activate" your init dir
git config --global init.templatedir '~/.git_template'