[aur-general] Appending prefix with fileuri to filename in source array

I'm currently messing around with local kernel PKGBUILDs containing a lot git format-patches from many different sources. I could always source them locally, find very tricky conditions to patch them in order, or bulk rename them; but I was wondering if it was possible to download and append a prefix without manually copying the whole filename from the uri. Basically from this: "${_prefix}0001-PATCH.patch::${_uripath}/0001-PATCH.patch" to something like this "${_prefix}#URI::${_uripath}/0001-PATCH.patch" I'm not too sure how to approach this or whether this is possible, but I am curious nonetheless. Many thanks, Tom Nguyen