timeclock-get-reason-function

timeclock-get-reason-function is a variable defined in `timeclock.el'.
Its value is

timeclock-ask-for-reason

• This variable may be risky if used as a file-local variable.

Documentation:
A function used to determine the reason for clocking out.
When clocking out, and no reason is specified, this function will be
called to determine what is the reason.
If this variable is nil, no questions will be asked.

You can customize this variable.