$ git clone -n https://src.fedoraproject.org/rpms/golang-github-mitchellh-copystructure.git /var/lib/mock/f37-build-side-33-golang-devel-117424-6265/root/chroot_tmpdir/scmroot/golang-github-mitchellh-copystructure
Cloning into '/var/lib/mock/f37-build-side-33-golang-devel-117424-6265/root/chroot_tmpdir/scmroot/golang-github-mitchellh-copystructure'...
error: RPC failed; curl 16 Error in the HTTP2 framing layer
fatal: the remote end hung up unexpectedly