The "sha3sum" command:

Usage: fossil sha3sum FILE...

Compute an SHA3 checksum of all files named on the command-line.
If a file is named "-" then take its content from standard input.


   --224        Compute a SHA3-224 hash
   --256        Compute a SHA3-256 hash (the default)
   --384        Compute a SHA3-384 hash
   --512        Compute a SHA3-512 hash
   --size N     An N-bit hash.  N must be a multiple of 32 between 128
                and 512.