$ git clone -n https://gitee.com/wency_cn/openjpeg2.git /var/lib/mock/dist-an23-build-494518-74593/root/chroot_tmpdir/scmroot/openjpeg2
Cloning into '/var/lib/mock/dist-an23-build-494518-74593/root/chroot_tmpdir/scmroot/openjpeg2'...
$ git fetch origin 26731517ae3371f4e8454b6a3cbb53a8a6ac1270:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/openjpeg2
 * [new ref]         26731517ae3371f4e8454b6a3cbb53a8a6ac1270 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2673151 Update code from upstream