我在git clone https://speech.nchc.org.tw/GrandChallenge/MATBN.git/ 時出現CA error

fatal: unable to access 'https://speech.nchc.org.tw/GrandChallenge/MATBN.git/': server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none

請問有人遇到類似的問題嗎?