$ git clone -n https://src.fedoraproject.org/rpms/libfontenc.git /var/lib/mock/f45-build-16176-483/root/chroot_tmpdir/scmroot/libfontenc
Cloning into '/var/lib/mock/f45-build-16176-483/root/chroot_tmpdir/scmroot/libfontenc'...
$ git fetch origin e2f99c8ba175d3b9fcc29a6e1fd88919ec99abb2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libfontenc
 * [new ref]         e2f99c8ba175d3b9fcc29a6e1fd88919ec99abb2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e2f99c8 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild