$ git clone -n https://src.fedoraproject.org/rpms/emacs-epc.git /var/lib/mock/f45-build-8076-376/root/chroot_tmpdir/scmroot/emacs-epc
Cloning into '/var/lib/mock/f45-build-8076-376/root/chroot_tmpdir/scmroot/emacs-epc'...
$ git fetch origin c4d3c496ce9f04140a17f385975bc8a1fcdd8ce8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/emacs-epc
 * [new ref]         c4d3c496ce9f04140a17f385975bc8a1fcdd8ce8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4d3c49 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild