$ git clone -n https://gitee.com/src-opencloudos-rpms/which /var/lib/mock/dist-oc8-build-58166-15968/root/chroot_tmpdir/scmroot/which
Cloning into '/var/lib/mock/dist-oc8-build-58166-15968/root/chroot_tmpdir/scmroot/which'...
$ git fetch origin oc8:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/which
 * [new branch]      oc8        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d5d44c1 import which-2.21-20.tl3