# File lib/new_relic/recipes/capistrano_legacy.rb, line 72
    def lookup_rev(rev)
      if rev.nil?
        rev = source.query_revision(source.head()) do |cmd|
          logger.debug "executing locally: '#{cmd}'"
          `#{cmd}`
        end

        rev = rev[0..6] if scm == :git
      end
      rev
    end