Using 0.4.62 git-buildpackage:
$ gzip --version
gzip 1.3.12
Copyright (C) 2007 Free Software Foundation, Inc.
Copyright (C) 1993 Jean-loup Gailly.
This is free software. You may redistribute copies of it under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.
Written by Jean-loup Gailly.
build-area$ git-import-dsc --verbose lrzip_0.44-1.dsc
Upstream version: 0.44
Debian version: 1
Upstream tarball: /srv/deb/todo/lrzip/build-area/lrzip_0.44.orig.tar.gz
Debian diff: /srv/deb/todo/lrzip/build-area/lrzip_0.44-1.diff.gz
No git repository found, creating one.
git ['init'] []
Initialized empty Git repository in /srv/deb/todo/lrzip/build-area/lrzip/.git/
tar ['-C', '/srv/deb/todo/lrzip/build-area/tmprPf7A4', '--gzip', '-xf', '/srv/deb/todo/lrzip/build-area/lrzip_0.44.orig.tar.gz'] []
tag upstream/0.44 not found, importing Upstream tarball
git ['add'] ['-f', '.']
git ['commit', '-a', '-q'] ['-m', 'Imported Upstream version 0.44']
git ['tag'] ['-m', 'Upstream version 0.44', 'upstream/0.44']
git ['branch'] ['upstream']
/usr/bin/pristine-tar [] ['commit', '/srv/deb/todo/lrzip/build-area/lrzip_0.44.orig.tar.gz', 'refs/heads/upstream']
warning: pristine-gz cannot reproduce build of /srv/deb/todo/lrzip/build-area/lrzip_0.44.orig.tar.gz; storing 87% size diff in delta
(Please consider filing a bug report so the delta size can be improved.)
pristine-tar: committed lrzip_0.44.orig.tar.gz.delta to branch pristine-tar
Merging to master
git ['merge', 'upstream', '--no-summary'] []
Already up-to-date.
git ['add'] ['-f', '.']
git ['commit', '-a', '-q'] ['-m', 'Imported Debian patch 0.44-1']
git ['tag'] ['-m', 'Debian release 0.44-1', 'debian/0.44-1']
rm ['-rf', '/srv/deb/todo/lrzip/build-area/tmprPf7A4'] []
Everything imported under 'lrzip'
The content of build-are is attached.