$ git clone -n https://gitee.com/wency_cn/libdex.git /var/lib/mock/dist-an23-build-502262-74802/root/chroot_tmpdir/scmroot/libdex
Cloning into '/var/lib/mock/dist-an23-build-502262-74802/root/chroot_tmpdir/scmroot/libdex'...
$ git fetch origin 3c5d63c46ea282372bb08908c5dcf2f0da9324a0:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/libdex
 * [new ref]         3c5d63c46ea282372bb08908c5dcf2f0da9324a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c5d63c Update code from upstream