The Debian packaging for getdns is kept in in git at
https://salsa.debian.org/dns-team/getdns.

In accordance with [DEP-14], the version in unstable is on the
'debian/master' branch, with the corresponding upstream version in the
'upstream' branch (with pristine-tar information in the pristine-tar
branch).

    [DEP-14] http://dep.debian.net/deps/dep14/

In addition to the "debian/master" branch, you should ensure that you
have local "pristine-tar" and "upstream" branches tracking the same
names from salsa.

When that is set up, it should be possible to build the package from
the debian/master by just running:

    gbp buildpackage

Merging upstream releases
=========================

You should ensure that you have upstream's git repository available in
addition to the debian packaging repository.  This lets you find the
upstream release tags.  You can ensure you have it set up with:

    git remote add upstream https://github.com/getdnsapi/getdns.git

Importing a new upstream version can be done from the debian/master
branch like so:

    git remote update upstream
    gbp import-orig --uscan

 -- Daniel Kahn Gillmor <dkg@fifthhorseman.net>, Fri, 23 Feb 2018 11:47:37 -0800