$ whoami
root
$ git clone -n http://8.131.229.236/anolis-os/firefox /var/lib/mock/dist-el8-build-6847-241/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/dist-el8-build-6847-241/root/chroot_tmpdir/scmroot/firefox'...
$ git reset --hard origin/a8
HEAD is now at abedc4c import firefox-68.6.0-1.el8_1.src.rpm