Function push_once 

pub fn push_once(
    git: &PushGit,
    landed_oid: &str,
    err: &mut dyn Write,
) -> Result<AutoPushResult, SingleFlightError>

What: Push a landed commit’s branch once, with no coordination with other processes. Why: The service’s push consumer is the only pusher of the repositories it serves and coalesces pending pushes of one branch into this single call, so it needs no lock; the output and the failure note are those of auto_push.

In TS you’d write (pseudocode):

const result = await pushOnce({ gitPath, cwd }, landedOid);