$ git clone -n https://src.fedoraproject.org/rpms/rust-timerfd.git /var/lib/mock/f37-build-side-31-rust-devel-106545-5636/root/chroot_tmpdir/scmroot/rust-timerfd
Cloning into '/var/lib/mock/f37-build-side-31-rust-devel-106545-5636/root/chroot_tmpdir/scmroot/rust-timerfd'...
error: RPC failed; curl 16 Error in the HTTP2 framing layer
fatal: the remote end hung up unexpectedly