Not able to build solr 6.6.2 from source after January 15, 2020

After Jan 15th maven is allowing only https connections to repo. But solr 6.6.2 version uses http connection. So builds are failing.

But looks like latest version of solr has the fix to this in common_build.xml and other places where it uses https connection to maven.

Error log:
ivy-bootstrap1:
[mkdir] Created dir: /root/.ant/lib
[echo] installing ivy 2.3.0 to /root/.ant/lib
[get] Getting:
http://repo1.maven.org/maven2/org/apache/ivy/ivy/2.3.0/ivy-2.3.0.jar

[get] To: /root/.ant/lib/ivy-2.3.0.jar
[get] Error opening connection
java.io
.IOException: Server returned HTTP response code: 501 for URL:
http://repo1.maven.org/maven2/org/apache/ivy/ivy/2.3.0/ivy-2.3.0.jar

[get] Error opening connection
java.io
.IOException: Server returned HTTP response code: 501 for URL:
http://repo1.maven.org/maven2/org/apache/ivy/ivy/2.3.0/ivy-2.3.0.jar

[get] Error opening connection
java.io
.IOException: Server returned HTTP response code: 501 for URL:
http://repo1.maven.org/maven2/org/apache/ivy/ivy/2.3.0/ivy-2.3.0.jar

[get] Can't get
http://repo1.maven.org/maven2/org/apache/ivy/ivy/2.3.0/ivy-2.3.0.jar
to /root/.ant/lib/ivy-2.3.0.jar

[NOTE]: It works on latest version of solr, where http is converted to https