Git 2.18.0 is slated to be released on Sunday June 17. It will include full support for git protocol v2, including the ability to negotiate partial ref advertisement. This will greatly reduce the size of the ref advertisements sent between the git server and clients every time the clients do a fetch. In turn, this should greatly speed up fetch.
Note that this also requires setting 'git config protocol.version 2' or 'git -c protocol.version=2' to take advantage of the full capabilities
Comment 1 by d...@chromium.org
, Jun 13 2018