$ git clone -n https://gitee.com/wenyuzifang/openjpeg2.git /var/lib/mock/dist-an23-build-482830-74272/root/chroot_tmpdir/scmroot/openjpeg2
Cloning into '/var/lib/mock/dist-an23-build-482830-74272/root/chroot_tmpdir/scmroot/openjpeg2'...
$ git fetch origin a2e7dd0e6f7635069e1ad009d7a9366acb3657d7:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/openjpeg2
 * [new ref]         a2e7dd0e6f7635069e1ad009d7a9366acb3657d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a2e7dd0 Update code from upstream