$ git clone -n https://gitee.com/mgb01105731/mock.git /var/lib/mock/dist-an23-build-337154-69704/root/chroot_tmpdir/scmroot/mock
Cloning into '/var/lib/mock/dist-an23-build-337154-69704/root/chroot_tmpdir/scmroot/mock'...
$ git fetch origin 28c8c8a2db6569a97262b27f46e08561e5a783cc:KOJI_FETCH_HEAD
From https://gitee.com/mgb01105731/mock
 * [new ref]         28c8c8a2db6569a97262b27f46e08561e5a783cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28c8c8a rebuild