mock question how do not clean BUILDROOT after build ?

[Sérgio Basto]

Hi, 

Mock after building and write the rpms, always execute %clean, doesn't
matter if I add --no-cleanup-after, example [1].
Have we any simple way to mock not perform %clean, at the end ? 
I need it to debug the make install ... 

Thanks,

[1]
Wrote: /builddir/build/RPMS/libmp4v2-debuginfo-2.1.0-0.4.trunkREV507.fc21.x86_64.rpm
Executing(%clean): /bin/sh -e /var/tmp/rpm-tmp.ilJSts
+ umask 022
+ cd /builddir/build/BUILD
+ cd mp4v2-trunk
+ /usr/bin/rm
-rf /builddir/build/BUILDROOT/libmp4v2-2.1.0-0.4.trunkREV507.fc21.x86_64
+ exit 0

-- 
Sérgio M. B.