What is 'git BRANCH'?

   Hi.

   I typed in "git BRANCH" by accident and got the error message: 
"fatal: cannot handle BRANCH internally".

   What does that mean?

   It is different from the usual "git: 'yada-yada' is not a 
git-command. See 'git --help'." message you get when you type in an 
incorrect command name.

   Just curious...

   Best regards,
     Jurko Gospodnetić