osc --version
0.152

from
http://download.opensuse.org/repositories/openSUSE:/Tools/SLE_12/


osc se -s --binary git|grep -v home|grep SLE_12
Emulators                         ppsspp                          
Emulators/SLE_12/src/ppsspp-git-20130427-1.1.src.rpm
Emulators                         ppsspp                          
Emulators/SLE_12/x86_64/ppsspp-git-20130427-1.1.x86_64.rpm
devel:tools                       git-merge-changelog             
devel:/tools/SLE_12/src/git-merge-changelog-20120413-11.1.src.rpm
devel:tools                       git-merge-changelog             
devel:/tools/SLE_12/x86_64/git-merge-changelog-20120413-11.1.x86_64.rpm

no git binaries for SLE_12,
but they exist:

osc ls -b devel:tools:scm git|grep SLE_12
SLE_12/x86_64

osc ls -b devel:tools:scm git
[..]
SLE_12/x86_64
 _buildenv
 _statistics
 git-2.4.5-252.1.src.rpm
 git-2.4.5-252.1.x86_64.rpm
[..]

I'd expect, that osc search also displays the git binaries built for SLE_12