1.20.2.r6 lwip failed during git recursive

[Colateral]

Any idea how to fix this?

Cloning into '/home/code/pycom-micropython-sigfox/lib/lwip'...
fatal: unable to access 'https://git.savannah.gnu.org/r/lwip.git/': server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
fatal: clone of 'https://git.savannah.gnu.org/r/lwip.git' into submodule path '/home/code/pycom-micropython-sigfox/lib/lwip' failed
Failed to clone 'lib/lwip'. Retry scheduled

[Colateral]

@Colateral I found: You need to

export GIT_SSL_NO_VERIFY=1