If it's metal and on the left side that is likely the parking brake cable. You can tie that up with wire or a nylon tie strap. It could also be a metal brake line but those are pretty stiff and not likely to bend unless a big chunk of ice got stuck to it. You can bend those back up but if it bent that easily it might be so rusted that it's going to spring a leak soon. Your mechanic can tell you exactly what the function of the part is.