$ git-tracker-cli --help

  Usage: git-tracker [OPTION]...

  Mandatory arguments to long options are mandatory for short options too.

   --path=<.>             Current directory by default
   --since=<1.days>       The last day by default
   --author=<author>      Current user by default
   --first-hour=<9>       9 by default

    --help     display this help and exit
    --version  output version information and exit