$ git clone -n https://src.fedoraproject.org/rpms/perl-JSON-Any.git /var/lib/mock/f45-build-24300-603/root/chroot_tmpdir/scmroot/perl-JSON-Any
Cloning into '/var/lib/mock/f45-build-24300-603/root/chroot_tmpdir/scmroot/perl-JSON-Any'...
$ git fetch origin c8bb643e9ccd14bf2bb7c9f1e77be21f7e72dc35:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-JSON-Any
 * [new ref]         c8bb643e9ccd14bf2bb7c9f1e77be21f7e72dc35 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c8bb643 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild