$ git clone -n https://gitee.com/src-opencloudos-rpms/gperf.git /var/lib/mock/dist-oc9-build-127466-76768/root/chroot_tmpdir/scmroot/gperf
Cloning into '/var/lib/mock/dist-oc9-build-127466-76768/root/chroot_tmpdir/scmroot/gperf'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/gperf
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f784fd2 import gperf-3.1-6.tl4