I’ve never seen a ticket system migration keep links alive. I’m sure there are professional IT centric orgs out there that prioritize this, but in my experience

I’ve never seen a ticket system migration keep links alive. I’m sure there are professional IT centric orgs out there that prioritize this, but in my experience, the version history (master branch) is what’s kept in practice, to keep migration cost down. Git blame is the best you can hope for, long-term.