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) = 4.17.2-1.fc42
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/10
/usr/lib/.build-id/10/07fa054c1c625de159713b4163369159f3b834
/usr/lib/.build-id/4f
/usr/lib/.build-id/4f/ddd0888baef8001bfefe6037d2a69e5bb74642
/usr/lib/.build-id/56
/usr/lib/.build-id/56/bd09e98aafde718c62dc862e0efbbd73eb4b79
/usr/lib/.build-id/af
/usr/lib/.build-id/af/a1bc43b9dc77d29101bd4136c4d530369ddf6e
/usr/lib/.build-id/c1
/usr/lib/.build-id/c1/8ee25c0af4e5fe0e0b08b1ca70980f7b3882ce
/usr/lib/.build-id/c9
/usr/lib/.build-id/c9/dcbc2ed6dd9854bf31af9e06e8983bcdfc0f1c
/usr/lib/.build-id/ec
/usr/lib/.build-id/ec/d4c5f426ee0a0a2b68c4e56b2c9ffbfcfe1794
/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
There is 17 files more in these RPM.