$ git clone -n https://gitee.com/src-opencloudos-rpms/jgit.git /var/lib/mock/dist-oc9-build-41809-14591/root/chroot_tmpdir/scmroot/jgit
Cloning into '/var/lib/mock/dist-oc9-build-41809-14591/root/chroot_tmpdir/scmroot/jgit'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/jgit
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7bd365b import jgit-6.1.0-2.tl4