Why my git doesn't work with bzr-make?

Question

I want to made deb package for virglrender in Ubuntu 16.04.

For git i did

git clone git://people.freedesktop.org/~airlied/virglrenderer
cd virglrenderer/
ls
./autogen.sh 
make
make install

Now I want to package

bzr dh-make  virglrenderer 102016git virglrenderer-102016git.tar.gz 

but it gives me this error

bzr: ERROR: Either run the command from an existing branch of upstream, or move virglrenderer/ aside and a new branch will be created there.

I did

cd ..

and redo

bzr dh-make  virglrenderer 102016git virglrenderer-102016git.tar.gz 

but give me this error again

bzr: ERROR: Either run the command from an existing branch of upstream, or move virglrenderer/ aside and a new branch will be created there.

How to do? I also tried to create the tar.gz manually with tar,nothing.