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

Provides :
application()
application(org.gtk.Demo4.desktop)
application(org.gtk.PrintEditor4.desktop)
application(org.gtk.WidgetFactory4.desktop)
application(org.gtk.gtk4.NodeEditor.desktop)
gtk4-devel-tools
gtk4-devel-tools(x86-64)
metainfo()
metainfo(org.gtk.Demo4.appdata.xml)
metainfo(org.gtk.PrintEditor4.appdata.xml)
metainfo(org.gtk.WidgetFactory4.appdata.xml)
metainfo(org.gtk.gtk4.NodeEditor.appdata.xml)

Requires :

gtk4(x86-64) = 4.17.4-3.fc43
libc.so.6()(64bit)
libc.so.6(GLIBC_2.14)(64bit)
libc.so.6(GLIBC_2.2.5)(64bit)
libc.so.6(GLIBC_2.28)(64bit)
libc.so.6(GLIBC_2.34)(64bit)
libc.so.6(GLIBC_2.38)(64bit)
libc.so.6(GLIBC_2.4)(64bit)
libc.so.6(GLIBC_ABI_DT_RELR)(64bit)
libcairo.so.2()(64bit)
libepoxy.so.0()(64bit)
libgdk_pixbuf-2.0.so.0()(64bit)
libgio-2.0.so.0()(64bit)
libglib-2.0.so.0()(64bit)
libgobject-2.0.so.0()(64bit)
libgraphene-1.0.so.0()(64bit)
libgtk-4.so.1()(64bit)
libharfbuzz.so.0()(64bit)
libm.so.6()(64bit)
libm.so.6(GLIBC_2.2.5)(64bit)
libm.so.6(GLIBC_2.29)(64bit)
libm.so.6(GLIBC_2.38)(64bit)
libpango-1.0.so.0()(64bit)
libpangocairo-1.0.so.0()(64bit)
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/gtk4-demo
/usr/bin/gtk4-demo-application
/usr/bin/gtk4-image-tool
/usr/bin/gtk4-node-editor
/usr/bin/gtk4-print-editor
/usr/bin/gtk4-rendernode-tool
/usr/bin/gtk4-widget-factory
/usr/lib/.build-id
/usr/lib/.build-id/32
/usr/lib/.build-id/32/81241a082b76b5fe4263d71b21306124964dff
/usr/lib/.build-id/36
/usr/lib/.build-id/36/8ccfe00a2205cdaaf83aa3d311074a37acde32
/usr/lib/.build-id/4a
/usr/lib/.build-id/4a/5da0227556065b2d36c0b3f2c0c8c6cf901ce8
/usr/lib/.build-id/97
/usr/lib/.build-id/97/cc87e9b3326f6486328c141ac01a0289453cc2
/usr/lib/.build-id/98/a81970406961bf3df9a93690527202229d0ac4
/usr/lib/.build-id/bb
/usr/lib/.build-id/bb/224ddcdab605181ddaf1d2371c7178d04b37d3
/usr/lib/.build-id/d9
/usr/lib/.build-id/d9/c62a1d72186048a5006e253141098138fe2f5f
/usr/share/applications/org.gtk.Demo4.desktop
/usr/share/applications/org.gtk.PrintEditor4.desktop
/usr/share/applications/org.gtk.WidgetFactory4.desktop
/usr/share/applications/org.gtk.gtk4.NodeEditor.desktop
/usr/share/glib-2.0/schemas/org.gtk.Demo4.gschema.xml
/usr/share/icons/hicolor/scalable/apps/org.gtk.Demo4.svg
/usr/share/icons/hicolor/scalable/apps/org.gtk.PrintEditor4.Devel.svg
/usr/share/icons/hicolor/scalable/apps/org.gtk.PrintEditor4.svg
/usr/share/icons/hicolor/scalable/apps/org.gtk.WidgetFactory4.svg
There is 16 files more in these RPM.