$ git clone -n https://src.fedoraproject.org/rpms/datovka.git /var/lib/mock/f40-build-2433373-60699/root/chroot_tmpdir/scmroot/datovka
Cloning into '/var/lib/mock/f40-build-2433373-60699/root/chroot_tmpdir/scmroot/datovka'...
$ git fetch origin 52bd811a3454bae92716c9adca7d7f2dc300e11a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/datovka
 * [new ref]         52bd811a3454bae92716c9adca7d7f2dc300e11a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 52bd811 New version