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

Provides :
libwnck3-devel
libwnck3-devel(x86-64)
pkgconfig(libwnck-3.0)

Requires :

libgdk-3.so.0()(64bit)
libc.so.6()(64bit)
libcairo-gobject.so.2()(64bit)
rtld(GNU_HASH)
libXext.so.6()(64bit)
libgtk-3.so.0()(64bit)
libgio-2.0.so.0()(64bit)
libwnck-3.so.0()(64bit)
pkgconfig(x11)
libpangocairo-1.0.so.0()(64bit)
pkgconfig(pango)
pkgconfig(gtk+-3.0)
rpmlib(PayloadIsXz) <= 5.2-1
libatk-1.0.so.0()(64bit)
pkgconfig(cairo)
libgobject-2.0.so.0()(64bit)
libXRes.so.1()(64bit)
pkgconfig(glib-2.0)
pkgconfig(xres)
libc.so.6(GLIBC_2.2.5)(64bit)
libX11.so.6()(64bit)
libXrender.so.1()(64bit)
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
libstartup-notification-1.so.0()(64bit)
libcairo.so.2()(64bit)
libc.so.6(GLIBC_2.4)(64bit)
/usr/bin/pkg-config
libwnck3(x86-64) = 3.20.1-1.el7
libglib-2.0.so.0()(64bit)
libgdk_pixbuf-2.0.so.0()(64bit)
libm.so.6()(64bit)
pkgconfig(libstartup-notification-1.0)
pkgconfig(gobject-2.0)
libpango-1.0.so.0()(64bit)

Content of RPM :
/usr/bin/wnckprop
/usr/include/libwnck-3.0
/usr/include/libwnck-3.0/libwnck
/usr/include/libwnck-3.0/libwnck/application.h
/usr/include/libwnck-3.0/libwnck/class-group.h
/usr/include/libwnck-3.0/libwnck/libwnck.h
/usr/include/libwnck-3.0/libwnck/pager.h
/usr/include/libwnck-3.0/libwnck/screen.h
/usr/include/libwnck-3.0/libwnck/selector.h
/usr/include/libwnck-3.0/libwnck/tasklist.h
/usr/include/libwnck-3.0/libwnck/util.h
/usr/include/libwnck-3.0/libwnck/version.h
/usr/include/libwnck-3.0/libwnck/window-action-menu.h
/usr/include/libwnck-3.0/libwnck/window.h
/usr/include/libwnck-3.0/libwnck/wnck-enum-types.h
/usr/include/libwnck-3.0/libwnck/workspace.h
/usr/lib64/libwnck-3.so
/usr/lib64/pkgconfig/libwnck-3.0.pc
/usr/share/gir-1.0/Wnck-3.0.gir
/usr/share/gtk-doc
/usr/share/gtk-doc/html
/usr/share/gtk-doc/html/libwnck-3.0
/usr/share/gtk-doc/html/libwnck-3.0/WnckApplication.html
/usr/share/gtk-doc/html/libwnck-3.0/WnckClassGroup.html
/usr/share/gtk-doc/html/libwnck-3.0/WnckPager.html
/usr/share/gtk-doc/html/libwnck-3.0/WnckScreen.html
/usr/share/gtk-doc/html/libwnck-3.0/WnckSelector.html
/usr/share/gtk-doc/html/libwnck-3.0/WnckTasklist.html
/usr/share/gtk-doc/html/libwnck-3.0/WnckWindow.html
/usr/share/gtk-doc/html/libwnck-3.0/WnckWorkspace.html
There is 36 files more in these RPM.