src/client/pfs.go
func (c APIClient) SetBranch(repoName string, commit string, branch string) error {
	return c.CreateBranch(repoName, branch, commit, nil)
}
func (c APIClient) SetBranch(repoName string, commit string, branch string) error {
	return c.CreateBranch(repoName, branch, commit, nil)
}
// SetBranch sets a commit and its ancestors as a branch.
// SetBranch is deprecated in favor of CommitBranch.