The best advice was gratuitous.

good looking out.

Make a script. I’d use xonsh or python with sh.py.

• create a dict for remote to local filename map
• walk your local collection
  • for each file, determine what the correct remote name (including a valid extension) would be, and add the pair to the dict, with remote filenames as keys, local filenames as values
• make a set like local_munged_names from that dict’s keys
• walk your remote tree, and store the filenames in a set like remote_names
• names_to_upload = local_munged_names - remote_names
• for each name in names to upload, look up the local filename from the remote to local filename map. Then, encode it if it needs encoding, and upload.

came here to see if Fedora had a --download-only equivalent.

meh