Checkout a branch, commit, or tag to your current workspace. 
dv checkout <ref> [--take-changes] [--shelve-changes] [--discard-changes] [--apply-shelf] [--ignore-shelf]
<ref> is the only mandatory parameter and the options are: <branch_name>, or <branch_id> if you want to checkout a branch. <commit_id> or <tag_id>, if you’re checking either of them. When checking out, there might be some local pending changes or incoming shelved changes. You can specify what to do in each case: [--take-changes] If your worskpace contains any changes, take them with you to the checked out target. [--shelve-changes] If your workspace contains any changes, shelve them for later use. [--discard-changes] Discard any changes in the workspace. [--apply-shelf] If the branch to be checked out contains any previously shelved changes, un-shelve them after check out. [--ignore-shelf] If the branch to be checked out contains any previously shelved changes, ignore them and don’t prompt to apply them.