Info Catalog
rcs: State option
rcs: Common elements
rcs: Misc common options
2.1.7 Working file mtime option
-------------------------------
Two commands that mutate the working file (⇒ci, ⇒co)
accept an option of the form ‘-M’ or ‘-MREV’.
This option works with ‘-u’ or ‘-l’ to specify that the working
file’s modification time should be set to the date associated with
revision REV (defaults to the branch tip if unspecified).
Like ‘-T’, this can be useful when the working file is named in a
Makefile target’s list of prerequisites.