$ git clone -n https://gitee.com/src-opencloudos-rpms/gcab.git /var/lib/mock/dist-oc9-build-127245-76583/root/chroot_tmpdir/scmroot/gcab
Cloning into '/var/lib/mock/dist-oc9-build-127245-76583/root/chroot_tmpdir/scmroot/gcab'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/gcab
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5906d87 import gcab-1.5-6.tl4