$ git clone -n https://src.fedoraproject.org/rpms/sil-gentium-basic-fonts.git /var/lib/mock/f45-build-35947-700/root/chroot_tmpdir/scmroot/sil-gentium-basic-fonts
Cloning into '/var/lib/mock/f45-build-35947-700/root/chroot_tmpdir/scmroot/sil-gentium-basic-fonts'...
$ git fetch origin 633d0414a075962cc9e1eadfd4d2c0d0bf4a0644:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sil-gentium-basic-fonts
 * [new ref]         633d0414a075962cc9e1eadfd4d2c0d0bf4a0644 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 633d041 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild