According to Deprecating TLSv1 and TLSv1.1 the support of older TLS versions will be disabled effective 1 December 2018.
The Git command line on UNIX-based systems (including macOS, Linux, and all BSDs) may be affected. You should be able to test your connection from the command line: GIT_CURL_VERBOSE=1 git ls-remote <a href="https://bitbucket.org/" target="_blank" rel="noopener noreferrer">https://bitbucket.org/</a> This will connect to Bitbucket using the Git client and list the connection parameters. If you see a line like “SSL connection using TLSv1.2” in the output, then you are unaffected; if that line mentions a different version of TLS, then you are affected.
<br>The verbose cURL output was supposed to show me the TLS version the Git command is using. But unfortunately it does not! 
# GIT_CURL_VERBOSE=1 git ls-remote https://bitbucket.org/
* Couldn't find host bitbucket.org in the .netrc file; using defaults
* Hostname was NOT found in DNS cache
* Trying 18.205.93.2...
* Connected to bitbucket.org (18.205.93.2) port 443 (#0)
* found 152 certificates in /etc/ssl/certs/ca-certificates.crt
* server certificate verification OK
* common name: bitbucket.org (matched)
* server certificate expiration date OK
* server certificate activation date OK
* certificate public key: EC
* certificate version: #3
* subject: businessCategory=Private Organization,jurisdictionOfIncorporationCountryName=US,jurisdictionOfIncorporationStateOrProvinceName=Delaware,serialNumber=3928449,C=US,ST=California,L=San Francisco,O=Atlassian\, Inc.,OU=Bitbucket,CN=bitbucket.org
* start date: Thu, 19 Apr 2018 00:00:00 GMT
* expire date: Tue, 21 Apr 2020 12:00:00 GMT
* issuer: C=US,O=DigiCert Inc,OU=www.digicert.com,CN=DigiCert SHA2 Extended Validation Server CA
* compression: NULL
* cipher: AES-128-GCM
* MAC: AEAD
> GET /info/refs?service=git-upload-pack HTTP/1.1
User-Agent: git/2.1.4
Host: bitbucket.org
Accept: */*
Accept-Encoding: gzip
Pragma: no-cache
< HTTP/1.1 404 Not Found
< Cache-Control: max-age=900
< Content-Type: text/plain; charset=utf-8
< X-B3-Traceid: 619fa84d196cc839d1e1f752c58f7282
< Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
< Date: Wed, 28 Nov 2018 09:28:24 GMT
< X-Server: 4c09ec53f585
< X-Content-Type-Options: nosniff
< Connection: close
< X-Version: a8c3445ad7
< Content-Length: 31
<
* Closing connection 0
remote: Repository info/refs not found
fatal: repository 'https://bitbucket.org/' not found
# git --version
git version 2.1.4
# curl --version
curl 7.38.0 (arm-unknown-linux-gnueabihf) libcurl/7.38.0 OpenSSL/1.0.1t zlib/1.2.8 libidn/1.29 libssh2/1.4.3 librtmp/2.3
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtmp rtsp scp sftp smtp smtps telnet tftp
Features: AsynchDNS IDN IPv6 Largefile GSS-API SPNEGO NTLM NTLM_WB SSL libz TLS-SRP
Please help me, time is running away!