$ whoami
root
$ git clone -n http://8.131.229.236/anolis-os/mesa /var/lib/mock/dist-el8-build-6398-106/root/chroot_tmpdir/scmroot/mesa
Cloning into '/var/lib/mock/dist-el8-build-6398-106/root/chroot_tmpdir/scmroot/mesa'...
$ git reset --hard origin/a8
HEAD is now at 6532488 import mesa-19.3.4-2.el8.src.rpm