Branch

Select the branch to check out.

Don't change

Attempt to do the checkout without any changes to the current files.

Discard

Select this to discard any changes that have been made or are pending in the current branch. To use Git terminology, the checkout will proceed even if the index or the working tree differs from HEAD (used to throw away local changes).

Stash

Stash all existing changes prior to doing the checkout. The message associated with the stash will read "WIP when checkout <branch name>: <timestamp>".