$ git clone -n https://gitee.com/zhangwenlong01/ceph_2.git /var/lib/mock/dist-an23-build-346859-70159/root/chroot_tmpdir/scmroot/ceph_2
Cloning into '/var/lib/mock/dist-an23-build-346859-70159/root/chroot_tmpdir/scmroot/ceph_2'...
$ git fetch origin ddff624fbc7673a48b2591eb6ef78505f6aa00c0:KOJI_FETCH_HEAD
From https://gitee.com/zhangwenlong01/ceph_2
 * [new ref]         ddff624fbc7673a48b2591eb6ef78505f6aa00c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ddff624 update to 18.2.1