[root@ ~]# rpm -Uvh  http://www.city-fan.org/ftp/contrib/yum-repo/rhel6/x86_64/city-fan.org-release-2-1.rhel6.noarch.rpm

[root@ ~]# yum --showduplicates list curl --disablerepo="*" --enablerepo="city*"
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * city-fan.org: www.city-fan.org
 * city-fan.org-source: www.city-fan.org
city-fan.org                                             | 3.0 kB     00:00
city-fan.org-debuginfo                                   | 3.0 kB     00:00
city-fan.org-source                                      | 3.0 kB     00:00
(1/3): city-fan.org-debuginfo/7/primary_db                 |  41 kB   00:01
(2/3): city-fan.org-source/7/primary_db                    | 356 kB   00:02
(3/3): city-fan.org/7/primary_db                           | 518 kB   00:02
Installed Packages
curl.x86_64                   7.29.0-59.el7_9.1                     @updates
Available Packages
curl.x86_64                   7.79.0-4.0.cf.rhel7                   city-fan.org

[root@master ~]# vim /etc/yum.repos.d/city-fan.org.repo
[city-fan.org]
name=city-fan.org repository for Red Hat Enterprise Linux (and clones) $releasever ($basearch)
#baseurl=http://mirror.city-fan.org/ftp/contrib/yum-repo/rhel$releasever/$basearch
mirrorlist=http://mirror.city-fan.org/ftp/contrib/yum-repo/mirrorlist-rhel$releasever
enabled=1
gpgcheck=1
gpgkey=file:/

[root@master nghttp2-master]# yum install curl
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * city-fan.org: www.city-fan.org
city-fan.org                                             | 3.0 kB     00:00
Resolving Dependencies
--> Running transaction check
---> Package curl.x86_64 0:7.29.0-59.el7_9.1 will be updated
---> Package curl.x86_64 0:7.79.0-4.0.cf.rhel7 will be an update
、、、、
Dependency Installed:
  keyutils-libs-devel.x86_64 0:1.5.8-3.el7
  krb5-devel.x86_64 0:1.15.1-50.el7
  libcom_err-devel.x86_64 0:1.42.9-19.el7
  libicu.x86_64 0:50.2-4.el7_7
  libkadm5.x86_64 0:1.15.1-50.el7
  libnghttp2.x86_64 0:1.33.0-1.1.el7
  libpsl.x86_64 0:0.7.0-1.el7
  libselinux-devel.x86_64 0:2.5-15.el7
  libsepol-devel.x86_64 0:2.5-10.el7
  libssh2-devel.x86_64 0:1.10.0-2.0.cf.rhel7
  libverto-devel.x86_64 0:0.2.5-4.el7
  nspr-devel.x86_64 0:4.25.0-2.el7_9
  nss-devel.x86_64 0:3.53.1-7.el7_9
  nss-softokn-devel.x86_64 0:3.53.1-6.el7_9
  nss-softokn-freebl-devel.x86_64 0:3.53.1-6.el7_9
  nss-util-devel.x86_64 0:3.53.1-1.el7_9
  openssl-devel.x86_64 1:1.0.2k-21.el7_9
  pcre-devel.x86_64 0:8.32-17.el7
  zlib-devel.x86_64 0:1.2.7-19.el7_9

Updated:
  curl.x86_64 0:7.79.0-4.0.cf.rhel7

Dependency Updated:
  libcurl.x86_64 0:7.79.0-4.0.cf.rhel7
  libcurl-devel.x86_64 0:7.79.0-4.0.cf.rhel7
  libssh2.x86_64 0:1.10.0-2.0.cf.rhel7

Complete!

[root@master ~]# curl -V
curl 7.79.0 (x86_64-redhat-linux-gnu) libcurl/7.79.0 NSS/3.53.1 zlib/1.2.7 libps                                                                             l/0.7.0 (+libicu/50.1.2) libssh2/1.10.0 nghttp2/1.33.0 OpenLDAP/2.4.44
Release-Date: 2021-09-15
Protocols: dict file ftp ftps gopher gophers http https imap imaps ldap ldaps mq                                                                             tt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp
Features: alt-svc AsynchDNS GSS-API HSTS HTTP2 HTTPS-proxy IPv6 Kerberos Largefi