$ git clone -n https://gitee.com/src-opencloudos-rpms/which.git /var/lib/mock/dist-oc9-build-45487-14591/root/chroot_tmpdir/scmroot/which
Cloning into '/var/lib/mock/dist-oc9-build-45487-14591/root/chroot_tmpdir/scmroot/which'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/which
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec9b77a import which-2.21-3.tl4