Capistrano 3 task for deploying on a server that has no outgoing SSH access to a repository

upload_repo.cap

namespace :local_repo do
  desc "Upload and deploy code from local copy of repo"
  task :upload do
    run_locally do
      execute :rm, '-rf', 'repo.git'
      execute :git, :clone, '--bare', '--single-branch', "-b #{fetch(:branch)}", ".", "repo.git"
      execute :tar, '-czvf', 'repo.tar.gz', 'repo.git'
    end

    on roles(:app) do
      upload! 'repo.tar.gz', '/tmp'
      within('/tmp') do
        execute :rm, '-rf', 'repo.git'
        execute :tar, '-xvzf', 'repo.tar.gz'
      end
    end
  end
end