Hondalos summed it up really good. I was a crew chief on C130s, always scrambling and getting yelled at to do something, whether its 0 degrees or 125 degrees, raining, snowing you are working out in the elements. One good thing about the herk was that you could sit inside while waiting for the crew to show up and you could become a flying crew chief and fly with the airplane but you were on your own if you had a maintenance issue, not sure how fighters work. Most of the work you do is routine maintenance, checking the oil, changing tires and brakes, replacing lightbulbs and cleaning the windows. Anything more in-depth the specialists will work it, you maybe able to help by holding the flashlight or running and getting the screwdriver they need.
Oh and don't get suckered into believing that you can work on AF jets and then get out and work on airliners. You'll have to pursue your Airframe & powerplant while you are in, the AF does have a program to help you study for it and then you will have to test for it which you have to pay for the test out of your own pocket, they wont just hand it to you.