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

Provides :
libwnck3-devel
libwnck3-devel(x86-32)
pkgconfig(libwnck-3.0)

Requires :

/usr/bin/pkg-config
libX11.so.6
libc.so.6
libc.so.6(GLIBC_2.0)
libc.so.6(GLIBC_2.1.3)
libc.so.6(GLIBC_2.2)
libc.so.6(GLIBC_2.34)
libc.so.6(GLIBC_2.38)
libc.so.6(GLIBC_2.4)
libc.so.6(GLIBC_ABI_DT_RELR)
libgdk-3.so.0
libglib-2.0.so.0
libgobject-2.0.so.0
libgtk-3.so.0
libwnck-3.so.0
libwnck3(x86-32) = 43.2-3.fc43
pkgconfig(cairo)
pkgconfig(glib-2.0)
pkgconfig(gobject-2.0)
pkgconfig(gtk+-3.0)
pkgconfig(libstartup-notification-1.0)
pkgconfig(pango)
pkgconfig(x11)
pkgconfig(xres)
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsZstd) <= 5.4.18-1
rtld(GNU_HASH)

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/icons.h
/usr/include/libwnck-3.0/libwnck/libwnck.h
/usr/include/libwnck-3.0/libwnck/misc.h
/usr/include/libwnck-3.0/libwnck/pager.h
/usr/include/libwnck-3.0/libwnck/resource.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/wnck-handle.h
/usr/include/libwnck-3.0/libwnck/workspace.h
/usr/lib/.build-id
/usr/lib/.build-id/e7
/usr/lib/.build-id/e7/9fed23b9eedba146a44e72944cab4ec7bd9a09
/usr/lib/libwnck-3.so
/usr/lib/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/WnckActionMenu.html
There is 31 files more in these RPM.