$ git clone -n https://src.fedoraproject.org/rpms/perl-Alien-FFI.git /var/lib/mock/f45-build-21624-587/root/chroot_tmpdir/scmroot/perl-Alien-FFI
Cloning into '/var/lib/mock/f45-build-21624-587/root/chroot_tmpdir/scmroot/perl-Alien-FFI'...
$ git fetch origin 067ddda802872f5eeb6b0692c385dab067a782f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Alien-FFI
 * [new ref]         067ddda802872f5eeb6b0692c385dab067a782f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 067ddda Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild