Function push_all_with 

pub fn push_all_with(
    cwd: &Path,
    tx: &dyn Transport,
    remote: Option<&str>,
    force: bool,
) -> Result<usize, DispatchError>

CAS-aware mirror push (mkit push --all). Pushes every local refs/heads/* to the remote, using the remote-tracking ref under refs/remotes/<remote>/<branch> as the CAS lease (Missing when no tracking ref exists, Match otherwise). force upgrades every write to an unconditional Any. On success each pushed branch’s remote-tracking ref is advanced to the pushed tip.

remote is the remote NAME used for the local tracking-ref namespace; None means the legacy default.