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: Andreas Tille <firstname.lastname@example.org>
Date: Wed May 23 13:29:41 2018 +0000
Fields are case sensitive
The Vcs URL https://anonscm.debian.org/debian-astro/packages/fitsh.git is deprecated/defunct, https://anonscm.debian.org/git/debian-astro/packages/fitsh.git was tried instead. Please update the Vcs field in debian/control.