The "revert" command:
Usage: fossil revert ?-r REVISION? ?FILE ...?
Revert to the current repository version of FILE, or to
the version associated with baseline REVISION if the -r flag
If FILE was part of a rename operation, both the original file
and the renamed file are reverted.
Revert all files if no file name is provided.
If a file is reverted accidently, it can be restored using
the "fossil undo" command.
-r REVISION revert given FILE(s) back to given REVISION
See also: redo, undo, update