Git: Suppress command logging for internal git-remote calls

Change-Id: I8cd93d0f5fdcc685af1cf1526eecf97d3b19eeff
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Git: Avoid superfluous execution of git status on commit

Change-Id: I1cba2902165a36bd313672c5b0e15333da71cd6e
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>