Yeah, the legacy project I'm working on isn't that modern... And even when rules are enforced, people sometimes work around them and leave a useless commit comment. Lax documentation, sometimes deliberately lax, is a person problem unfortuntely - one better solved in ways that HR would disaprove of then via technical blocks!
That just shouldn't be allowed. Commits without JIRA (or whatever you use) task reference should just be automaticaly rejected.