[ginac/f20] cleanup.

[Christopher Meng]

commit 80e909745cf54abe31a786bd38597d69e32d71f0
Author: Christopher Meng <i at cicku.me>
Date:   Tue Dec 31 18:56:04 2013 +0800

    cleanup.

 ginac.spec |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/ginac.spec b/ginac.spec
index 6d886f1..329f203 100644
--- a/ginac.spec
+++ b/ginac.spec
@@ -52,7 +52,7 @@ simple and easy-to-use CAS-like interface to GiNaC for non-programmers, and
 the tool "viewgar" which displays the contents of GiNaC archives.
 
 %prep
-%setup -q
+%setup -qn ginac-%{commit}
 %patch0 -p1 -b .ginac_pc_in
 
 %build