$ git clone -n https://gitee.com/src-opencloudos-rpms/ninja-build.git /var/lib/mock/dist-oc9-build-43173-14591/root/chroot_tmpdir/scmroot/ninja-build
Cloning into '/var/lib/mock/dist-oc9-build-43173-14591/root/chroot_tmpdir/scmroot/ninja-build'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/ninja-build
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8af81be import ninja-build-1.10.2-1.oc9