Thank you for responding quickly. I've looked through upstream sccache's repo already and could not find the "sccache-push" script in question. I believe, maybe wrongly, that it must have been added as part of the Debian package.
I even checked Arch's repos to make sure, and it looks like "sccache-push" isn't part of that package either. https://archlinux.org/packages/extra/x86_64/sccache/ If you still believe this script is not under your jurisdiction, feel free to close this bug report.
