$ git clone -n https://src.fedoraproject.org/rpms/sil-doulos-fonts.git /var/lib/mock/f45-build-35966-700/root/chroot_tmpdir/scmroot/sil-doulos-fonts
Cloning into '/var/lib/mock/f45-build-35966-700/root/chroot_tmpdir/scmroot/sil-doulos-fonts'...
$ git fetch origin 76467e5fd01851943d23fcc47df2e00a36bd46d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sil-doulos-fonts
 * [new ref]         76467e5fd01851943d23fcc47df2e00a36bd46d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 76467e5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild