The "touch" command:

Usage: fossil touch ?OPTIONS? ?FILENAME...?

For each file in the current checkout matching one of the provided
list of glob patterns and/or file names, the file's mtime is
updated to a value specified by one of the flags --checkout,
--checkin, or --now.

If neither glob patterns nor filenames are provided, it operates on
all files managed by the currently checked-out version.

This command gets its name from the conventional Unix "touch"
command.

Options:
  --now          Stamp each affected file with the current time.
                 This is the default behavior.
  -c|--checkin   Stamp each affected file with the time of the
                 most recent check-in which modified that file.
  -C|--checkout  Stamp each affected file with the time of the
                 currently-checked-out version.
  -g GLOBLIST    Comma-separated list of glob patterns.
  -G GLOBFILE    Similar to -g but reads its globs from a
                 fossil-conventional glob list file.
  -v|-verbose    Outputs extra information about its globs
                 and each file it touches.
  -n|--dry-run   Outputs which files would require touching,
                 but does not touch them.
  -q|--quiet     Suppress warnings, e.g. when skipping unmanaged
                 or out-of-tree files.

Only one of --now, --checkin, and --checkout may be used. The
default is --now.

Only one of -g or -G may be used. If neither is provided and no
additional filenames are provided, the effect is as if a glob of
'*' were provided, i.e. all files belonging to the
currently-checked-out version. Note that all glob patterns provided
via these flags are always evaluated as if they are relative to the
top of the source tree, not the current working (sub)directory.
Filenames provided without these flags, on the other hand, are
treated as relative to the current directory.

As a special case, files currently undergoing an uncommitted merge
might not get timestamped with --checkin because it may be
impossible for fossil to choose between multiple potential
timestamps. A non-fatal warning is emitted for such cases.