$ git clone -n https://gitee.com/geliwei/cloud-kernel.git /var/lib/mock/dist-an8-plus-build-60538-32864/root/chroot_tmpdir/scmroot/cloud-kernel
Cloning into '/var/lib/mock/dist-an8-plus-build-60538-32864/root/chroot_tmpdir/scmroot/cloud-kernel'...
$ git reset --hard origin/a8-4.19
fatal: ambiguous argument 'origin/a8-4.19': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'