I couldn't really consistently replicate it until I randomly read somewhere about it. In any case, I tested it a bit in Kampinoska and discovered that cancelling the movement not only gives the option to refuel the unit, but also gives other options like embarking on a train, after which I deselect the unit, select it again and disembark from the train and this action restores all previously used recon movement as if the unit never moved at all, and this can be endlessly repeated which is quite funny, at least until the fuel runs out.
Not sure how useful that actually is, but thought it was cool enough to share it

Heh, this reminded me of the old Panzer General 2 where a recon movement hero on a para unit meant you could embark on a plane, go to a location, disembark and attack, all in the very same turn. Which was obviously beyond broken, but fun to use!