These options are available on many commands.
Override the author cert for a commit; normally, the author is the
local name of the key used for the commit. See
Specify the branch for a command. This normally defaults to the workspace branch.
Override the date cert for a commit. The date defaults to the current calendar time.
Set the commit changelog message, as a string. Each command that does a commit has a different default for the message.
Set the commit changelog message, as a file. Each command that does a commit has a different default for the message.
If --update is given, and the command is executed in a workspace, the workspace is updated to the new head of the workspace branch if the workspace was at a head, and the command makes a new head of the workspace branch.