Hydrangea- cutting back due to impending fence work

I am having some work done on a short run of fence panels that create a courtyard and adjacent to one of the posts (which is being replaced) is a nice hydrangea of approx 4'x4'x4'
Its going to be in the way and rather than have it trampled on I was thinking of cutting it back. Any reasons not to do so? The work is due to start tomorrow.
Thanks
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Bumping....
If It's going to be in the way and get battered anyway, you may as well cut it back. They're fairly tough shrubs l find !
Aye - crack on Dave
Would it be better moved out of the way altogether? Other people (workmen) aren't renowned for delicately placing their big feet, if you know what I mean....
I live in west central Scotland - not where that photo is...
Thanks folks. Just come in from doing it! I'd read that the flowers only appear on the old wood so I've tried to keep a good few stems that are out of the way (a bit) cut down to a pair of buds. The rest I'm sure will regrow just no flowers next year (except for the few stems I 'saved') but that's fine.
thanks again.