This should be written into your construction documents. You can almost certainly move it to a temporary pole mount, but the contractor must then accept responsibility for making sure none of his equipment damages either the cables or the dishes (like whacking it with a backhoe).
When roofers did a complete tear-off on my roof they tried to tell me they weren't responsible for the dish. I said, "It may be that NORMALLY you're not responsible for the dish, but on this job you are responsible for protecting it during demolition, not to exceed 24 hours, and for properly remounting. You are not responsible for re-peaking the signal."
I had it written into the contract. It's not a big deal. In my case all the really did was remove the dishes, still on their mounts, and suspend them over the side of the house, NOT using the cable as a tie-off. When done, they brought them back up and bolted them back onto the roof after squaring things up and placing them as near as possible to where they were. Mast plumb. That's all I expected out of them. They aren't satellite installers. They're roofers.
But after MANY years in construction supervision, I can tell you that they will ALWAYS try to tell you they aren't responsible and unless it's written into the contract they will ALWAYS be not responsible. They usually have it in their boilerplate somewhere. MAKE them responsible, but in as simple a fashion as you can. Get the construction company supervisor out there, explain the concern, and figure out how it will be solved. You may need to compromise on such things as ..... where can a temporary pole mount go that will be out of the way of the construction activity? If the location is mutually agreed upon, then it becomes that construction supervisor's responsibility to see that it isn't disturbed. You may need to install the pole yourself and remount the dishes, but once done, they should be protected for the duration of the construction. This includes the cables. How can you protect the cables? What kind of heavy equipment do they expect to bring in? Can the cables be protected in conduit in such as way that you can simply separate it at a splice and move it out of the way on those days when equipment might damage it?
Think a little bit. Anyone on here can tell you anything they want as far as opinion. This is YOUR construction job. YOU need to take responsibility and come up with a solution that works and doesn't place so much responsibility on the contractor, that he charges you up the wazoo for fear of you losing TV for an afternoon.