$ git clone -n https://gitee.com/zhuzhustu/anaconda_2.git /var/lib/mock/dist-an23-build-537590-83194/root/chroot_tmpdir/scmroot/anaconda_2
Cloning into '/var/lib/mock/dist-an23-build-537590-83194/root/chroot_tmpdir/scmroot/anaconda_2'...
$ git fetch origin 25923a92a35f878804d31b6c9f0b26da058892e4:KOJI_FETCH_HEAD
From https://gitee.com/zhuzhustu/anaconda_2
 * [new ref]         25923a92a35f878804d31b6c9f0b26da058892e4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 25923a9 Change "+=" to add() in grub param updating for arm