No I dont think they can do this, but I wouldnt worry, im on the 3rd floor of a maisonette about 20 foot up, and they didnt have any issues installing mine, they will discuss with you where you want the ONT installed and then drill a hole through the wall inside to outside, they then fit the fibre cable to the telegraph pole, and droop the rest of the cable across the floor, then they drill a large steel hook into the outside of your wall and pull the cable taut and thread it through the steel hook they just fitted a few times, as there would be nothing else between the ONT installed in your property and the telegraph pole to stop the cable getting ripped out of the ONT on a windy day for instance, they then push the cable through the hole they drilled in the wall and fit a white plastic plate to your internal wall, which they wrap the excess cable around, finally fit a plug to the cable and plug it into the ONT.
Just to make you aware, as soon as they had finished, mine sort of went live, it did and it didnt, the engineer didnt understand it, then about 2 mins later I got an email stating they were going to take a part month payment from my bank account, as soon as that went my services went live.
I could be wrong, maybe they can work the other way around, inside to outside to the pole.