$ git clone -n https://src.fedoraproject.org/rpms/sil-gentium-plus-fonts.git /var/lib/mock/f45-build-35972-700/root/chroot_tmpdir/scmroot/sil-gentium-plus-fonts
Cloning into '/var/lib/mock/f45-build-35972-700/root/chroot_tmpdir/scmroot/sil-gentium-plus-fonts'...
$ git fetch origin 01e35025e73d831cfdb4ea2da9bbc6f92d1aaaed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sil-gentium-plus-fonts
 * [new ref]         01e35025e73d831cfdb4ea2da9bbc6f92d1aaaed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 01e3502 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild