$ whoami
root
$ git clone -n http://8.131.229.236/anolis-os/byacc /var/lib/mock/dist-el8-build-6115-80/root/chroot_tmpdir/scmroot/byacc
Cloning into '/var/lib/mock/dist-el8-build-6115-80/root/chroot_tmpdir/scmroot/byacc'...
$ git reset --hard origin/a8
HEAD is now at 54e5f29 import byacc-1.9.20170709-4.el8.src.rpm