Update the ticket git repo after having sent the notifications
    
    On pagure.io some project fail to update their ticket git repo because
    of "too many files open" errors.
    But they also fail to send notification about the new comment added to
    the database.
    With this fix, they should be able to get the notification regardless of
    whether pagure could update successfully the ticket git repository.
    
    Fixes https://pagure.io/pagure/issue/3973
    
    Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>