$ git clone -n https://gitee.com/src-opencloudos-rpms/mingw-libpng.git /var/lib/mock/dist-oc8-build-235850-82205/root/chroot_tmpdir/scmroot/mingw-libpng
Cloning into '/var/lib/mock/dist-oc8-build-235850-82205/root/chroot_tmpdir/scmroot/mingw-libpng'...
$ git fetch origin 9c81dff22ef3b851a10889b771825f175158c4d9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/mingw-libpng
 * [new ref]         9c81dff22ef3b851a10889b771825f175158c4d9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c81dff import mingw-libpng-1.6.34-2.tl3