$ git clone -n https://gitee.com/wenyuzifang/openjpeg2.git /var/lib/mock/dist-an23-build-462943-73832/root/chroot_tmpdir/scmroot/openjpeg2
Cloning into '/var/lib/mock/dist-an23-build-462943-73832/root/chroot_tmpdir/scmroot/openjpeg2'...
$ git fetch origin 80c62880f7dacd5ecd9a1c4bcff8199d95bb3180:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/openjpeg2
 * [new ref]         80c62880f7dacd5ecd9a1c4bcff8199d95bb3180 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 80c6288 Update code from upstream