$ git clone -n https://src.fedoraproject.org/rpms/rubygem-railties.git /var/lib/mock/f38-build-side-42-init-devel-662539-26636/root/chroot_tmpdir/scmroot/rubygem-railties
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-662539-26636/root/chroot_tmpdir/scmroot/rubygem-railties'...
error: RPC failed; HTTP 504 curl 22 The requested URL returned error: 504
fatal: the remote end hung up unexpectedly