$ git clone -n https://gitee.com/src-opencloudos-rpms/perl-YAML-LibYAML.git /var/lib/mock/dist-oc9-build-71422-47556/root/chroot_tmpdir/scmroot/perl-YAML-LibYAML
Cloning into '/var/lib/mock/dist-oc9-build-71422-47556/root/chroot_tmpdir/scmroot/perl-YAML-LibYAML'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/perl-YAML-LibYAML
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f423e80 import perl-YAML-LibYAML-0.86-3.tl4