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

Provides :
pkgconfig(rhythmbox)
rhythmbox-devel
rhythmbox-devel(x86-64)

Requires :

/usr/bin/pkg-config
pkgconfig(gio-2.0) >= 2.66.0
pkgconfig(glib-2.0) >= 2.66.0
pkgconfig(gobject-2.0) >= 2.66.0
pkgconfig(gstreamer-1.0) >= 1.4.0
pkgconfig(gtk+-3.0) >= 3.16.0
pkgconfig(libsoup-3.0) >= 3.0.7
pkgconfig(libxml-2.0) >= 2.7.8
pkgconfig(totem-plparser) >= 3.2.0
rhythmbox(x86-64) = 3.4.8-1.fc42
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsZstd) <= 5.4.18-1

Content of RPM :
/usr/include/rhythmbox
/usr/include/rhythmbox/backends
/usr/include/rhythmbox/backends/rb-encoder.h
/usr/include/rhythmbox/backends/rb-player-gst-filter.h
/usr/include/rhythmbox/backends/rb-player-gst-helper.h
/usr/include/rhythmbox/backends/rb-player-gst-tee.h
/usr/include/rhythmbox/backends/rb-player.h
/usr/include/rhythmbox/lib
/usr/include/rhythmbox/lib/libmediaplayerid
/usr/include/rhythmbox/lib/libmediaplayerid/mediaplayerid.h
/usr/include/rhythmbox/lib/rb-async-copy.h
/usr/include/rhythmbox/lib/rb-builder-helpers.h
/usr/include/rhythmbox/lib/rb-chunk-loader.h
/usr/include/rhythmbox/lib/rb-debug.h
/usr/include/rhythmbox/lib/rb-file-helpers.h
/usr/include/rhythmbox/lib/rb-gst-media-types.h
/usr/include/rhythmbox/lib/rb-list-model.h
/usr/include/rhythmbox/lib/rb-stock-icons.h
/usr/include/rhythmbox/lib/rb-string-value-map.h
/usr/include/rhythmbox/lib/rb-task-progress-simple.h
/usr/include/rhythmbox/lib/rb-task-progress.h
/usr/include/rhythmbox/lib/rb-util.h
/usr/include/rhythmbox/metadata
/usr/include/rhythmbox/metadata/rb-ext-db-key.h
/usr/include/rhythmbox/metadata/rb-ext-db.h
/usr/include/rhythmbox/metadata/rb-metadata.h
/usr/include/rhythmbox/plugins
/usr/include/rhythmbox/plugins/rb-plugin-macros.h
/usr/include/rhythmbox/podcast
/usr/include/rhythmbox/podcast/rb-podcast-manager.h
There is 63 files more in these RPM.