Copies an item or set of items, including metadata and version control history, from one location to another in Team Foundation ...

Copies an item or set of items, including metadata and version control history,
from one location to another in Team Foundation version control and in the
workspace.

tf branch olditem newitem [/version:versionspec] [/noget]
          [/lock:(none|checkin|checkout)] [/noprompt]
          [/silent] [/checkin] [/comment:("comment"|@commentfile)]
          [/author:author name]
          [/login:username,[password]]
          [/notes:("Note Name"="note text"|@notefile)]