$ git clone -n https://src.fedoraproject.org/rpms/libdatovka.git /var/lib/mock/f45-build-16007-481/root/chroot_tmpdir/scmroot/libdatovka
Cloning into '/var/lib/mock/f45-build-16007-481/root/chroot_tmpdir/scmroot/libdatovka'...
$ git fetch origin ff17b2b854f79644135c23eaf5469936bde348f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libdatovka
 * [new ref]         ff17b2b854f79644135c23eaf5469936bde348f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff17b2b New version