$ git clone -n https://src.fedoraproject.org/rpms/emacs-deferred.git /var/lib/mock/f45-build-8075-376/root/chroot_tmpdir/scmroot/emacs-deferred
Cloning into '/var/lib/mock/f45-build-8075-376/root/chroot_tmpdir/scmroot/emacs-deferred'...
$ git fetch origin 728dcdc44b5b10f2059f92f67868c1f78a594e2f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/emacs-deferred
 * [new ref]         728dcdc44b5b10f2059f92f67868c1f78a594e2f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 728dcdc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild