Can i adjust my body's biological clock so that I can poop at a different time of the day?

I'm a cop and I work from 6AM-6PM. I get up every morning and try to poop before I put on all of my duty gear but I can't and like clockwork at 7:30 mother nature calls and I have to take off all of my duty gear to poop. Please help. What can I do to make myself poop as soon as I get out of bed?