$ git clone -n https://gitee.com/wency_cn/openjpeg2_1770978760.git /var/lib/mock/dist-an23-build-514556-75110/root/chroot_tmpdir/scmroot/openjpeg2_1770978760
Cloning into '/var/lib/mock/dist-an23-build-514556-75110/root/chroot_tmpdir/scmroot/openjpeg2_1770978760'...
$ git fetch origin b920c6fed3b66edca7ededdefc5ca45731e6d89d:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/openjpeg2_1770978760
 * [new ref]         b920c6fed3b66edca7ededdefc5ca45731e6d89d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b920c6f Update code from upstream