California labor law question?

I'm a full time hourly paid employee in California. 2-3 times a month I'm required to come in on a Sunday (the business is closed) to take care of some things that only take between 15 and 45 minutes to complete. I'm only paid for the time I'm there and it's a bummer since I work 23 miles from my home.

I know there is such a think as "reporting time pay" that guarantees being paid for 2-4 hours if you show up expecting to be scheduled for a full day but are send home due to a lack of work. Would this apply to my situation even though I'm not scheduled to work a full day?