$ git clone -n https://gitee.com/lxpzlm/mysql.git /var/lib/mock/dist-an8_6-build-146644-57720/root/chroot_tmpdir/scmroot/mysql
Cloning into '/var/lib/mock/dist-an8_6-build-146644-57720/root/chroot_tmpdir/scmroot/mysql'...
$ 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>...]'