this package seems to have new commits in its VCS but has
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the Debian changelog and uploading this new version into the archive.
Here are the relevant commit logs:
Author: Dmitry Smirnov <firstname.lastname@example.org>
Date: Sun Oct 20 22:17:16 2019 +1100
Tighten "golang-golang-x-sys-dev" dep versioning (Closes: #910328).
Thanks, Guillem Jover.