$ whoami
root
$ git clone -n http://8.131.229.236/anolis-os/libnsl2 /var/lib/mock/dist-el8-build-577-27/root/chroot_tmpdir/scmroot/libnsl2
Cloning into '/var/lib/mock/dist-el8-build-577-27/root/chroot_tmpdir/scmroot/libnsl2'...
$ git reset --hard origin/a8
HEAD is now at 07d54ae import libnsl2-1.2.0-2.20180605git4a062cf.el8.src.rpm