this package seems to have new commits in its VCS but has
not yet updated debian/changelog. You should consider updating
the Debian changelog and uploading this new version into the archive.
Here are the relevant commit logs:
Author: Ole Streicher <firstname.lastname@example.org>
Date: Sat Jan 6 11:16:51 2018 +0100
Update VCS fields to use salsa.d.o
The Vcs URL git://anonscm.debian.org/debian-astro/packages/astromatic.git is deprecated/defunct, https://anonscm.debian.org/git/debian-astro/packages/astromatic.git was tried instead. Please update the Vcs field in debian/control.