Can you Look up the historical content of a transactional email that's set on trigger?

For context, we're always looking to update/optimize triggered emails such as abandoned cart emails. These updates happen directly in marketo meaning the old version of that triggered email gets updated.

The question is: can I look up the version of the email that was sent say, 3 months ago? Using marketo's email performance report and pinpointing the date or range I want to look at shows me the campaign was executed but when I click on the link to preview the message that was sent on that date it shows the current version of that email.

How can I find the version of the triggered email that was sent on June 23rd, 2018 for example?

Thanks all for any help/context you can provide.