$ git clone -n https://gitee.com/fundawang/memcached.git /var/lib/mock/dist-an23-build-285785-64820/root/chroot_tmpdir/scmroot/memcached
Cloning into '/var/lib/mock/dist-an23-build-285785-64820/root/chroot_tmpdir/scmroot/memcached'...
$ git fetch origin 9a21c5def31c00ed18643a9b8944e7c7993a8378:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/memcached
 * [new ref]         9a21c5def31c00ed18643a9b8944e7c7993a8378 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a21c5d 1.6.21