$ git clone -n https://gitee.com/wenyuzifang/trousers.git /var/lib/mock/dist-an23-build-486840-74383/root/chroot_tmpdir/scmroot/trousers
Cloning into '/var/lib/mock/dist-an23-build-486840-74383/root/chroot_tmpdir/scmroot/trousers'...
$ git fetch origin 0302d80e5c71619debcbc076998f38fc50fcbe5a:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/trousers
 * [new ref]         0302d80e5c71619debcbc076998f38fc50fcbe5a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0302d80 Update code from upstream