$ git clone -n https://gitee.com/lxpzero/jbig2dec.git /var/lib/mock/dist-an23.3-build-421218-72884/root/chroot_tmpdir/scmroot/jbig2dec
Cloning into '/var/lib/mock/dist-an23.3-build-421218-72884/root/chroot_tmpdir/scmroot/jbig2dec'...
$ git fetch origin 761442e9a3220033c6a10453acb9f3e36d2ecd49:KOJI_FETCH_HEAD
From https://gitee.com/lxpzero/jbig2dec
 * [new ref]         761442e9a3220033c6a10453acb9f3e36d2ecd49 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 761442e update to 0.20 from 0.19