$ git clone -n https://src.fedoraproject.org/rpms/emacs-epl.git /var/lib/mock/f45-build-8079-376/root/chroot_tmpdir/scmroot/emacs-epl
Cloning into '/var/lib/mock/f45-build-8079-376/root/chroot_tmpdir/scmroot/emacs-epl'...
$ git fetch origin ce95c5bd142c544b33c61fe86387fa5c3e60dbb6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/emacs-epl
 * [new ref]         ce95c5bd142c544b33c61fe86387fa5c3e60dbb6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce95c5b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild