$ git clone -n https://src.fedoraproject.org/rpms/megaglest-data.git /var/lib/mock/f45-build-18220-511/root/chroot_tmpdir/scmroot/megaglest-data
Cloning into '/var/lib/mock/f45-build-18220-511/root/chroot_tmpdir/scmroot/megaglest-data'...
$ git fetch origin 35f8e06076ec1a7520ce92a2e5501746b64a2e24:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/megaglest-data
 * [new ref]         35f8e06076ec1a7520ce92a2e5501746b64a2e24 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 35f8e06 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild