$ git clone -n https://gitee.com/winterddd/librsvg2.git /var/lib/mock/dist-an23-build-480762-74252/root/chroot_tmpdir/scmroot/librsvg2
Cloning into '/var/lib/mock/dist-an23-build-480762-74252/root/chroot_tmpdir/scmroot/librsvg2'...
$ git fetch origin b859497f9034e2dd038c5b0ef13241cc3be73e1d:KOJI_FETCH_HEAD
From https://gitee.com/winterddd/librsvg2
 * [new ref]         b859497f9034e2dd038c5b0ef13241cc3be73e1d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b859497 add unpackaged file