$ git clone -n http://fedora.riscv.rocks:3000/rpms/libcxx.git /var/lib/mock/f37-build-642889-72076/root/chroot_tmpdir/scmroot/libcxx
Cloning into '/var/lib/mock/f37-build-642889-72076/root/chroot_tmpdir/scmroot/libcxx'...
$ git reset --hard ee1b5cea88ca37af2b9e887b0320b2e3f58f6cdc
HEAD is now at ee1b5ce Bootstrap on riscv64