$ git clone -n https://src.fedoraproject.org/rpms/R-readr.git /var/lib/mock/f40-build-746051-112347/root/chroot_tmpdir/scmroot/R-readr
Cloning into '/var/lib/mock/f40-build-746051-112347/root/chroot_tmpdir/scmroot/R-readr'...
error: RPC failed; HTTP 503 curl 22 The requested URL returned error: 503
fatal: the remote end hung up unexpectedly