Ask HN: Relation between commits and issues

Hi, today I stumbled upon an email which stated that there is no such thing as a correlation between issues (tasks, bugs, ..) and commits.

I, personally, think that such a relation exists and every bug should be fixed with one commit referring the bug (ok, if a commit solves two or more bugs this may not be true, but just for the sake of simplicity). I also strongly believe that any source code commit should be linked to some sort of tracking system which makes clear WHY someone would change the codebase.

I'm a not-so-senior developer so I'd love to hear some of your considerations about it, especially from more experienced developers.