$ git clone -n https://gitee.com/src-opencloudos-rpms/libyaml.git /var/lib/mock/dist-oc9-build-70640-47457/root/chroot_tmpdir/scmroot/libyaml
Cloning into '/var/lib/mock/dist-oc9-build-70640-47457/root/chroot_tmpdir/scmroot/libyaml'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libyaml
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a056e2 import libyaml-0.2.5-4.tl4