6139e5692edf684a

// import tls "github.com/refraction-networking/utls"
tcpConn, err := net.Dial("tcp", "tlsfingerprint.io:443")
if err != nil {
	fmt.Printf("net.Dial() failed: %+v\n", err)
	return
}

config := tls.Config{ServerName: "tlsfingerprint.io"}
// This fingerprint includes feature(s), not fully supported by TLS.
// uTLS client with this fingerprint will only be able to to talk to servers,
// that also do not support those features. 
tlsConn := tls.UClient(tcpConn, &tlsConfig, tls.HelloCustom)
clientHelloSpec := tls.ClientHelloSpec {
	CipherSuites: []uint16{
		0xc062,
		0xc04f,
		0xc063,
		0xc078,
		0xc08c,
		0xc079,
		0xc08d,
		0xc00b,
		0xc00c,
		0x005b,
		0x005c,
		0x0057,
		0xc017,
		0x005a,
		0xc018,
		0xc019,
		0x0059,
		0xc015,
		0xc016,
		0x0058,
		0x004f,
		0x0052,
		0x0051,
		0x0050,
		0x0053,
		0x0056,
		0x0055,
		0x0054,
		0x0081,
		0x0083,
		0x0080,
		0x0082,
		0xc102,
		0xc100,
		0xc103,
		0xc105,
		0xc101,
		0xc104,
		0xc106,
		0x0029,
		0x0026,
		0x002a,
		0x0027,
		0x002b,
		0x0028,
		0x0023,
		0x001f,
		0x0022,
		0x001e,
		0x0025,
		0x0021,
		0x0024,
		0x0020,
		0x0000,
		0xc0aa,
		0xc0ab,
		0x008b,
		0x008c,
		0x00ae,
		0xc0a4,
	},
	CompressionMethods: []byte{
		0x00, // compressionNone
	},
	Extensions: []tls.TLSExtension{
		&tls.SNIExtension{},
		&tls.SupportedPointsExtension{SupportedPoints: []byte{
			0x00, // pointFormatUncompressed
		}},
		&tls.SupportedCurvesExtension{[]tls.CurveID{
			tls.CurveP256,
			tls.CurveP384,
			tls.CurveP521,
			tls.X25519,
			0x0100,
		}},
		&tls.SignatureAlgorithmsExtension{SupportedSignatureAlgorithms: []tls.SignatureScheme{
			0x0101,
			tls.PKCS1WithSHA1,
			0x0301,
			tls.PKCS1WithSHA256,
			0x0402,
			tls.ECDSAWithP256AndSHA256,
			0x0407,
			0x0408,
			tls.PKCS1WithSHA512,
			0x0602,
			tls.ECDSAWithP521AndSHA512,
			0x0607,
			0x0608,
		},},
	},
}
tlsConn.ApplyPreset(&clientHelloSpec)
        
n, err = tlsConn.Write([]byte("Hello, World!"))
// or tlsConn.Handshake() for better control