$ git clone -n https://src.fedoraproject.org/rpms/perl-Kwiki-Raw.git /var/lib/mock/f45-build-24293-603/root/chroot_tmpdir/scmroot/perl-Kwiki-Raw
Cloning into '/var/lib/mock/f45-build-24293-603/root/chroot_tmpdir/scmroot/perl-Kwiki-Raw'...
$ git fetch origin 12b15c2e6a49bd1dddf04336c46e246aad98354f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Kwiki-Raw
 * [new ref]         12b15c2e6a49bd1dddf04336c46e246aad98354f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 12b15c2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild