Fellas, how does deal attribution work with yall?

So I work with a team of 15 reps. We sell a SaaS software, leads primarily come from social media ads.

We demo the software, process dictates that we work on on the deal for 2 months and then mark it as lost if it's leading nowhere. Our sales cycle is typically 3-4 weeks otherwise (deal that close, usually close in this span)

I wanted to know, if the prospect were to come back after 2 months and register as a new lead and the lead were assigned to another rep and they closed it, would the deal be attributed to the first rep or second? How does it work where you work? (leads tend to use alternate email IDs on the lead forms so the CRM assigns it to another rep)