Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
pkgconfig(grass)
grass-devel
grass-devel(x86-32)

Requires :

libgrass_interpdata.so.6.4
libgrass_rli.so.6.4
libgrass_dbmidriver.so.6.4
libgrass_interpfl.so.6.4
pkgconfig(xt)
libgrass_sqlp.so.6.4
libgrass_driver.so.6.4
libgrass_gproj.so.6.4
libgrass_cairodriver.so.6.4
libgrass_gmath.so.6.4
libgrass_cluster.so.6.4
lesstif-devel
libgrass_psdriver.so.6.4
libgrass_qtree.so.6.4
libgrass_rowio.so.6.4
libgrass_display.so.6.4
libgrass_nviz.so.6.4
xorg-x11-proto-devel
libgrass_arraystats.so.6.4
libgrass_cdhc.so.6.4
libgrass_segment.so.6.4
libgrass_btree.so.6.4
libgrass_ogsf.so.6.4
libgrass_trans.so.6.4
libgrass_bitmap.so.6.4
libgrass_gis.so.6.4
libgrass_lidar.so.6.4
gdal-devel
libgrass_form.so.6.4
wxPython-devel
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(CompressedFileNames) <= 3.0.4-1
libgrass_vect.so.6.4
libX11-devel
libgrass_dbmiclient.so.6.4
libgrass_Iortho.so.6.4
proj-devel
libgrass_vedit.so.6.4
pkgconfig(gdal)
libgrass_raster.so.6.4
grass-libs = 6.4.2-2.fc15
libgrass_sites.so.6.4
libgrass_symb.so.6.4
libgrass_dgl.so.6.4
libgrass_neta.so.6.4
pkgconfig(xproto)
libgrass_gpde.so.6.4
libgrass_dspf.so.6.4
pkgconfig(x11)
libgrass_edit.so.6.4
pkgconfig(glproto)
libgrass_sim.so.6.4
rpmlib(PayloadIsXz) <= 5.2-1
libgrass_rtree.so.6.4
libgrass_datetime.so.6.4
libgrass_I.so.6.4
libgrass_vask.so.6.4
libgrass_g3d.so.6.4
libXt-devel
pkgconfig
libgrass_stats.so.6.4
libgrass_shape.so.6.4
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
libgrass_dbstubs.so.6.4
libgrass_linkm.so.6.4
libgrass_dig2.so.6.4
mesa-libGL-devel
/usr/bin/pkg-config
libgrass_dbmibase.so.6.4
libgrass_lrs.so.6.4
libgrass_pngdriver.so.6.4

Content of RPM :
/usr/include/grass
/usr/include/grass/CC.h
/usr/include/grass/G3d.h
/usr/include/grass/N_gwflow.h
/usr/include/grass/N_heatflow.h
/usr/include/grass/N_pde.h
/usr/include/grass/N_solute_transport.h
/usr/include/grass/P_datetime.h
/usr/include/grass/P_site.h
/usr/include/grass/Paintlib.h
/usr/include/grass/PolimiFunct.h
/usr/include/grass/V_.h
/usr/include/grass/Vect.h
/usr/include/grass/arraystats.h
/usr/include/grass/bdlg_bm.h
/usr/include/grass/bitmap.h
/usr/include/grass/blas.h
/usr/include/grass/btree.h
/usr/include/grass/cdhc.h
/usr/include/grass/cluster.h
/usr/include/grass/codes.h
/usr/include/grass/colors.h
/usr/include/grass/config-32.h
/usr/include/grass/config.h
/usr/include/grass/dataquad.h
/usr/include/grass/datetime.h
/usr/include/grass/dbmi.h
/usr/include/grass/devlib.h
/usr/include/grass/dgl
/usr/include/grass/dgl.h
There is 193 files more in these RPM.