Place this to your Capfile

gistfile1.rb

server 'server.host.or.ip.address', :app
set :user, 'user'
set :deploy_to, '/path/to/deploy'

set :repository, 'git repository address'
set :branch, 'origin/master'

namespace :deploy do
  desc 'Deploy'
  task :default do
    update
    restart
  end

  desc 'Setup'
  task :setup do
    run "mkdir -p #{deploy_to} && git clone #{repository} #{deploy_to}"
  end

  desc 'Update'
  task :update do
    update_code
  end

  desc 'Update the deployed code'
  task :update_code do
    run "cd #{deploy_to} && git fetch origin && git reset --hard #{branch}"
  end

  desc 'Restart'
  task :restart do
    run "mkdir -p #{deploy_to}/tmp && touch #{deploy_to}/tmp/restart.txt"
  end

  desc 'Show pending commits'
  task :pending do
    current_revision = capture("cd #{deploy_to} && git rev-parse HEAD").chomp
    system("git log #{current_revision}..#{branch}")
  end
end