$ git clone -n https://gitee.com/lx1229207124/diffutils.git /var/lib/mock/dist-an7_9-updates-build-288140-64876/root/chroot_tmpdir/scmroot/diffutils
Cloning into '/var/lib/mock/dist-an7_9-updates-build-288140-64876/root/chroot_tmpdir/scmroot/diffutils'...
$ git fetch origin 90acc105e0bc23c97072f7a423d4054f15a5ebf2:KOJI_FETCH_HEAD
From https://gitee.com/lx1229207124/diffutils
 * [new ref]         90acc105e0bc23c97072f7a423d4054f15a5ebf2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90acc10 spec: add doc sub package