timeclock-get-project-function

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

timeclock-ask-for-project

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

Documentation:
The function used to determine the name of the current project.
When clocking in, and no project is specified, this function will be
called to determine what is the current project to be worked on.
If this variable is nil, no questions will be asked.

You can customize this variable.