$ git clone -n https://gitee.com/wenyuzifang/openjpeg2.git /var/lib/mock/dist-an23-build-469476-74027/root/chroot_tmpdir/scmroot/openjpeg2
Cloning into '/var/lib/mock/dist-an23-build-469476-74027/root/chroot_tmpdir/scmroot/openjpeg2'...
$ git fetch origin 30ae555980d4c6e7202f49b51be8d3653d92ed0c:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/openjpeg2
 * [new ref]         30ae555980d4c6e7202f49b51be8d3653d92ed0c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 30ae555 Update code from upstream