The "deconstruct" command:

Usage fossil deconstruct ?OPTIONS? DESTINATION


This command exports all artifacts of a given repository and
writes all artifacts to the file system. The DESTINATION directory
will be populated with subdirectories AA and files AA/BBBBBBBBB.., where
AABBBBBBBBB.. is the 40+ character artifact ID, AA the first 2 characters.
If -L|--prefixlength is given, the length (default 2) of the directory
prefix can be set to 0,1,..,9 characters.

Options:
  -R|--repository REPOSITORY  Deconstruct given REPOSITORY.
  -K|--keep-rid1              Save the filename of the artifact with RID=1 to
                              the file .rid1 in the DESTINATION directory.
  -L|--prefixlength N         Set the length of the names of the DESTINATION
                              subdirectories to N.
  --private                   Include private artifacts.

See also: rebuild, reconstruct