How can i send an email with the edited fields from a Closed Won Deal?

How can i send an email with the edited fields from a Closed Won Deal?

I already have a workflow rule set to send an email whenever someone in my organization edits a Closed Won Deal. But the email contains only the deal that has been edited, not which fields that were update. Is there a way that i can add the edited fields on to the body of the email? 

I know i can check the Timeline directly on the deal page, so is there a way i can forward timeline details via email if adding the edited info in the workflow rule email doesnt work?