People should know what others are working through discussions, status updates, team meetings, project plan, Jira/whatever, etc. They should not find out when a commit occurs.

There would also be code reviews (right?) so at least a subset of most relevant people should know what is happening before the commit occurs (after code review).

It's also a good idea to have something like gitweb available so anyone can quickly have a look at what has happened on the master repo.

To me pushed notifications seem like noise.