An ostree content unit represents an OSTree branch head. A Pulp ostree repository
may be synchronized with a remote ostree repository. Each content unit created during
synchronization with (the same)
remote shares filesystem storage.
A Pulp ostree repository is configured with a list of branch names (or trees) which determines which branches are pulled during synchronization with its remote. The list of branches may be modified after the repository has been created.
refs can be added, updated and deleted. But, content objects stored
local repositories are immutable and cannot be deleted. An orphaned
local repository is removed during orphan removal.