ostree 2017.5-1 (s390x binary) in ubuntu artful

 OSTree is a tool and library for managing bootable, immutable, versioned
 filesystem trees. It is like git in that it checksums individual files
 and has a content-addressed object store; unlike git, it "checks out"
 the files using hardlinks into an immutable directory tree. This
 can be used to provide atomic upgrades with rollback, history and
 parallel-installation, particularly useful on "fixed purpose" systems
 such as embedded devices.
 .
 This package contains the executables used to manage and create
 filesystem trees. It does not affect the boot process for the system
 on which it is installed.