Problem:
When running git clone, you see an error message like
Cloning into 'MyProject'... fatal: unable to access 'https://gitlab.mydomain.com/projects/MyProject.git': server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
Solution:
The quick solution is to prepend
GIT_SSL_NO_VERIFY=true
to the git clone command, example:
GIT_SSL_NO_VERIFY=true https://gitlab.mydomain.com/projects/MyProject.git
Note that skipping SSL verification is a security risk, so the correct method of fixing this issue is appropriately updating the CA certificates (something like sudo apt install ca-certificates) but this is sometimes not feasibel since not any outdated computer can be updated easily.