git returns http error 407 from proxy after CONNECT

What worked for me is something similar to what rohitmohta is proposing ; in regular DOS command prompt (not on git bash) :

first

git config --global http.proxy http://username:password@proxiURL:proxiPort

and in some cases also

git config --global https.proxy http://username:password@proxiURL:proxiPort

then

git config --global http.sslVerify false

(I confirm it’s necessary : if set to true getting “SSL certificate problem: unable to get local issuer certificate” error)

in my case, no need of defining all_proxy variable

and finally

git clone https://github.com/someUser/someRepo.git