$ git clone -n https://gitee.com/src-opencloudos-rpms/nbdkit.git /var/lib/mock/dist-oc9-build-121158-71565/root/chroot_tmpdir/scmroot/nbdkit
Cloning into '/var/lib/mock/dist-oc9-build-121158-71565/root/chroot_tmpdir/scmroot/nbdkit'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/nbdkit
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 78b7bc1 import nbdkit-1.38.4-2.tl4