$ git clone -n https://gitee.com/src-opencloudos-rpms/libpng.git /var/lib/mock/dist-oc9-build-230426-81465/root/chroot_tmpdir/scmroot/libpng
Cloning into '/var/lib/mock/dist-oc9-build-230426-81465/root/chroot_tmpdir/scmroot/libpng'...
$ git fetch origin 842d41b7c6b61e8c8f59fd662b5f0109daed182b:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libpng
 * [new ref]         842d41b7c6b61e8c8f59fd662b5f0109daed182b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 842d41b import libpng-1.6.40-6.tl4