$ git clone -n https://gitee.com/src-opencloudos-rpms/xz-java.git /var/lib/mock/dist-oc9-build-49628-14595/root/chroot_tmpdir/scmroot/xz-java
Cloning into '/var/lib/mock/dist-oc9-build-49628-14595/root/chroot_tmpdir/scmroot/xz-java'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/xz-java
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05f1a77 import xz-java-1.9-4.tl4