In large measure, you actually can't, since there's a good chance those repos are behind HTTPS-only these days, and those versions of Git will be linked to anci

In large measure, you actually can't, since there's a good chance those repos are behind HTTPS-only these days, and those versions of Git will be linked to ancient versions of OpenSSL that won't even talk to modern TLS implementations, the two being unable to agree on a common ciphersuite. Beyond about 10 years, you usually end up freezing old binaries in place along with old data in order to continue manipulating it anyway.