hi, IMHO,

but here the main problem is add the issue number at commit description

developers solve some issues and forget about add the issue tracker number to comment

here (at my projects) we parse the commit with a php script hook, that found strings like "#SMM-1234567"  (#SMM is the project name, 1234567 is the issue id), after founding the script link the commit to issue via rest api

The problem occur when there's no #SMM string in commit

There's no "don't commit" hook at git, at least i didn't see this here, if anyone know if there's a "don't commit" feature at bzr or git :) please share this information :)

The only problem of a "most have issue tracker string", is when developers do some new features not tracked by issue tracker