curl: (60) SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
More details here: http://curl.haxx.se/docs/sslcerts.html

curl https://curl.haxx.se/ca/cacert.pem -o /etc/pki/tls/certs/ca-bundle.crt

# cat /etc/pki/ca-trust/source/README
This directory /etc/pki/ca-trust/source/ contains CA certificates and
trust settings in the PEM file format. The trust settings found here will be
interpreted with a high priority - higher than the ones found in
/usr/share/pki/ca-trust-source/.

=============================================================================
QUICK HELP: To add a certificate in the simple PEM or DER file formats to the
            list of CAs trusted on the system:

            Copy it to the
                    /etc/pki/ca-trust/source/anchors/
            subdirectory, and run the
                    update-ca-trust
            command.

            If your certificate is in the extended BEGIN TRUSTED file format,
            then place it into the main source/ directory instead.
=============================================================================

Please refer to the update-ca-trust(8) manual page for additional information

curl --cacert /etc/ssl/certs/ca-bundle.crt https://google.com/

rpm -qf /etc/pki/tls/certs/ca-bundle.crt

sudo yum reinstall ca-certificates