$ git clone -n https://src.fedoraproject.org/rpms/perl-Chemistry-Canonicalize.git /var/lib/mock/f45-build-22281-590/root/chroot_tmpdir/scmroot/perl-Chemistry-Canonicalize
Cloning into '/var/lib/mock/f45-build-22281-590/root/chroot_tmpdir/scmroot/perl-Chemistry-Canonicalize'...
$ git fetch origin a5f7ef5cfa3dd730a790908293806c8a302bba24:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Chemistry-Canonicalize
 * [new ref]         a5f7ef5cfa3dd730a790908293806c8a302bba24 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a5f7ef5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild