So I ran the build with;
gbp buildpackage --git-debian-branch="pureos/master"
Lintian says;
E: gpodder source: invalid-version-number-for-derivative 3.10.21-1-1 (must end with pureosX) W: gpodder source: inconsistent-appstream-metadata-license share/metainfo/org.gpodder.gpodder.appdata.xml (cc0-1.0 != gpl-3+) W: gpodder: unusual-interpreter usr/share/gpodder/extensions/rm_ogg_cover.py #!/usr/bin/python W: gpodder: unusual-interpreter usr/share/gpodder/extensions/rockbox_convert2mp4.py #!/usr/bin/python W: gpodder: unusual-interpreter usr/share/gpodder/extensions/tagging.py #!/usr/bin/python W: gpodder: wrong-bug-number-in-closes #T1096 in the installed changelog (line 3) `