$ git clone -n https://gitee.com/src-opencloudos-rpms/libpng15.git /var/lib/mock/dist-oc8-build-242001-82932/root/chroot_tmpdir/scmroot/libpng15
Cloning into '/var/lib/mock/dist-oc8-build-242001-82932/root/chroot_tmpdir/scmroot/libpng15'...
$ git fetch origin cb9d9adee8fc54989813ea1253332456dd0661a9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libpng15
 * [new ref]         cb9d9adee8fc54989813ea1253332456dd0661a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cb9d9ad import libpng15-1.5.30-9.tl3