The libibverbs git repo is no longer in use.  The libibverbs package,
as well as all other RDMA related packages that directly open and use
the various kernel device files specific to the RDMA subsystem, have
been pulled together into a single package called rdma-core that is
now hosted on github:

git://github.com/linux-rdma/rdma-core

All future code and releases will be through signed tags in the above
repository.

Thanks,

The linux RDMA community.