$ git clone -n https://src.fedoraproject.org/rpms/emacs-pkg-info.git /var/lib/mock/f45-build-8111-376/root/chroot_tmpdir/scmroot/emacs-pkg-info
Cloning into '/var/lib/mock/f45-build-8111-376/root/chroot_tmpdir/scmroot/emacs-pkg-info'...
$ git fetch origin 5499a7fe8cf666b055a6d0f4bbad91713cc0ff48:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/emacs-pkg-info
 * [new ref]         5499a7fe8cf666b055a6d0f4bbad91713cc0ff48 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5499a7f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild