$ git clone -n https://src.fedoraproject.org/rpms/virtualbox-guest-additions.git /var/lib/mock/f38-build-side-42-init-devel-1066670-29776/root/chroot_tmpdir/scmroot/virtualbox-guest-additions
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1066670-29776/root/chroot_tmpdir/scmroot/virtualbox-guest-additions'...
error: RPC failed; curl 16 Error in the HTTP2 framing layer
fatal: the remote end hung up unexpectedly