git: RPC failed; result=22, HTTP code = 504

git clone http://review.coreboot.org/p/coreboot.git coreboot Cloning into ‘coreboot’… error: RPC failed; result=22, HTTP code = 504 fatal: The remote end hung up unexpectedly

The error occurs in ‘libcurl’, which is the underlying protocol for http. To get more details about the error, set GIT_CURL_VERBOSE=1