The "cat" command:

Usage: fossil cat FILENAME ... ?OPTIONS?

Print on standard output the content of one or more files as they exist in the repository. The version currently checked out is shown by default. Other versions may be specified using the -r option.

Options:

-o|--out OUTFILE
For exactly one given FILENAME, write to OUTFILE
-R|--repository REPO
Extract artifacts from repository REPO
-r VERSION
The specific check-in containing the file