$ git clone -n https://src.fedoraproject.org/rpms/libffi.git /var/lib/mock/f45-build-395-227/root/chroot_tmpdir/scmroot/libffi
Cloning into '/var/lib/mock/f45-build-395-227/root/chroot_tmpdir/scmroot/libffi'...
$ git fetch origin f27f1a03b95f7c62f86bb4e623c02ff78bf6fa28:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libffi
 * [new ref]         f27f1a03b95f7c62f86bb4e623c02ff78bf6fa28 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f27f1a0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild