$ git clone -n https://gitee.com/magic-orange/libpng.git /var/lib/mock/dist-an8.9-build-366329-71163/root/chroot_tmpdir/scmroot/libpng
Cloning into '/var/lib/mock/dist-an8.9-build-366329-71163/root/chroot_tmpdir/scmroot/libpng'...
$ git fetch origin e0da847e6407a7f3fdfa6d9425af8e52f3b2c173:KOJI_FETCH_HEAD
From https://gitee.com/magic-orange/libpng
 * [new ref]         e0da847e6407a7f3fdfa6d9425af8e52f3b2c173 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0da847 spec: rebuild for loongarch