What
The error message shown when a push-on-release fails for a governed git mount was reworded. It now says "this runner-side push does not use the session's git-mount push URL," replacing older wording that described the governed mount as simply read-only. When a remote name is involved, the message now also explains that git skips every url.*.pushInsteadOf rule, including global and system-level ones, for this particular push, so the credential being used has to work on its own without relying on such a rule.
Why
This gives a more accurate explanation of why a runner-side push might fail with credential errors, clarifying that push-URL rewriting rules don't apply and the credential must work unassisted.
Names in the bundlepushInsteadOf