$ git clone -n https://src.fedoraproject.org/rpms/perl-FFI-CheckLib.git /var/lib/mock/f45-build-23461-597/root/chroot_tmpdir/scmroot/perl-FFI-CheckLib
Cloning into '/var/lib/mock/f45-build-23461-597/root/chroot_tmpdir/scmroot/perl-FFI-CheckLib'...
$ git fetch origin 331f3f0183fd349653ea743685e97261748e7185:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-FFI-CheckLib
 * [new ref]         331f3f0183fd349653ea743685e97261748e7185 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 331f3f0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild