the same as typing t 1f1db72c modify project:… due:… …. an empty box clears that field.
this is a demo. the data is invented, it is shared with everyone else looking, and it is wiped every night. don't put anything real in it. what is this?
$ tracker 1f1db72c-8d8a-4ad9-8d9a-8709798c3040 e