As I can see from concat's code, fragments are assembled under `${fragdir}/fragments`, and this directory is purged of unmanaged files, so changing the name will just mean that the old one will be deleted. 

Also I can confirm that `concatfragments.sh` orders the files alphabetically by default unless `$order` is set to *numeric* when setting up concat (don't confuse with `$order` of `concat::fragment`). So in this case, it seems to me that the order will be kept, as `$location` is the only significant part of the fragment's name that affects the order.