first, I'm not a Linux administrator but I'm trying to understand the situation here.
I know about the Bitbucket deprecating TLSv1 (https://bitbucket.org/blog/deprecating-tlsv1-tlsv1-1-2018-12-01)

we are using Crucible and I check the JAVA version and its version 1.8. based on the article we should be ok.

I ran this command: echo | openssl s_client -connect bitbucket.org:443 | grep Protocol

and the result is Protocol : TLSv1.2

GIT_CURL_VERBOSE=1 git ls-remote https://bitbucket.org/

• Couldn't find host bitbucket.org in the .netrc file; using defaults
• About to connect() to bitbucket.org port 443 (#0)
• Trying 18.205.93.0... * Connected to bitbucket.org (18.205.93.0) port 443 (#0)
• Initializing NSS with certpath: sql:/etc/pki/nssdb
• CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
• NSS error -12286
• Expire cleared
• Closing connection BCLOUD-0
• Couldn't find host bitbucket.org in the .netrc file; using defaults
• About to connect() to bitbucket.org port 443 (#0)
• Trying 18.205.93.0... * Connected to bitbucket.org (18.205.93.0) port 443 (#0)
• CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
• NSS error -12286
• Closing connection BCLOUD-0
  error: while accessing https://bitbucket.org//info/refs

not sure how to continue my investigation

thanks