git clone http://git.debian.org/git/collab-maint/systemtap.git
cd systemtap
dch -v 2.0-1~experimental1~try1
sid git commit debian/changelog -m 'update changelog'
uscan --download-current-version --rename --verbose
mv systemtap_2.0.orig.tar.gz ..
git checkout -b upstream origin/upstream
git checkout -b pristine-tar origin/pristine-tar
git checkout master
git-import-orig --pristine-tar -u2.0 ../systemtap_2.0.orig.tar.gz || true
git-buildpackage -S

(cd ~/scm/systemtap-upstream && git log --pretty=oneline > ~/a); for i in *.patch; do if ! grep -q "$(grep ^Subject: $i|cut -d']' -f2-)" ~/a; then echo $i; fi; done