$ git clone -n https://src.fedoraproject.org/rpms/perl-App-ccdiff.git /var/lib/mock/f45-build-21714-587/root/chroot_tmpdir/scmroot/perl-App-ccdiff
Cloning into '/var/lib/mock/f45-build-21714-587/root/chroot_tmpdir/scmroot/perl-App-ccdiff'...
$ git fetch origin 4285597735de240f670e81e2c2981a3252ba315c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-App-ccdiff
 * [new ref]         4285597735de240f670e81e2c2981a3252ba315c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4285597 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild