$ whoami
root
$ git clone -n http://8.131.229.236/anolis-os/atf /var/lib/mock/dist-an8-build-5736-35/root/chroot_tmpdir/scmroot/atf
Cloning into '/var/lib/mock/dist-an8-build-5736-35/root/chroot_tmpdir/scmroot/atf'...
$ git reset --hard origin/a8
fatal: ambiguous argument 'origin/a8': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'