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

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

Requires :

/usr/bin/pkg-config
bash = 4.4.20-4.el8
pkgconf-pkg-config
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsXz) <= 5.2-1

Content of RPM :
/usr/include/bash
/usr/include/bash/alias.h
/usr/include/bash/array.h
/usr/include/bash/arrayfunc.h
/usr/include/bash/assoc.h
/usr/include/bash/bashansi.h
/usr/include/bash/bashintl.h
/usr/include/bash/bashjmp.h
/usr/include/bash/bashtypes.h
/usr/include/bash/builtins
/usr/include/bash/builtins.h
/usr/include/bash/builtins/bashgetopt.h
/usr/include/bash/builtins/builtext.h
/usr/include/bash/builtins/common.h
/usr/include/bash/builtins/getopt.h
/usr/include/bash/command.h
/usr/include/bash/config-bot.h
/usr/include/bash/config-top.h
/usr/include/bash/config.h
/usr/include/bash/conftypes.h
/usr/include/bash/dispose_cmd.h
/usr/include/bash/error.h
/usr/include/bash/externs.h
/usr/include/bash/general.h
/usr/include/bash/hashlib.h
/usr/include/bash/include
/usr/include/bash/include/ansi_stdlib.h
/usr/include/bash/include/chartypes.h
/usr/include/bash/include/filecntl.h
/usr/include/bash/include/gettext.h
There is 32 files more in these RPM.