$ git clone -n https://gitee.com/happy_orange/chromium.git /var/lib/mock/dist-an23-build-256821-63722/root/chroot_tmpdir/scmroot/chromium
Cloning into '/var/lib/mock/dist-an23-build-256821-63722/root/chroot_tmpdir/scmroot/chromium'...
$ git reset --hard origin/amaster
fatal: ambiguous argument 'origin/amaster': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'