$ whoami
root
$ git clone -n http://8.131.229.236/anolis-os/mpfr /var/lib/mock/dist-el8-build-781-27/root/chroot_tmpdir/scmroot/mpfr
Cloning into '/var/lib/mock/dist-el8-build-781-27/root/chroot_tmpdir/scmroot/mpfr'...
$ git reset --hard origin/a8
HEAD is now at 7e10306 import mpfr-3.1.6-1.el8.src.rpm