you can't. basically, you have to wait until the sponsor recieves notification from CIC. Contrary to what the website says, receipt numbers will NOT work for checking status. Only file numbers and UCI numbers will allow someone to log in. those are not provided until SA, and CIC doesn't seem to be sending acknowledgement of receipts (AOR) anymore for outland applications. for a majority of applicants, the online system won't work until AFTER receiving SA, as the information is generally not entered into the system until that point.
My suggestion would be to joing the July applicant thread to get an idea about the process. SA is currently taking about 2 months. CIC just started processing june applications, and there are plenty of may applicants still waiting.