$ git clone -n https://src.fedoraproject.org/rpms/emacs.git /var/lib/mock/f41-build-side-1-2811223-32927/root/chroot_tmpdir/scmroot/emacs
Cloning into '/var/lib/mock/f41-build-side-1-2811223-32927/root/chroot_tmpdir/scmroot/emacs'...
$ git fetch origin 155673080c59b0ec73fcab658b652b7ef3eb3692:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/emacs
 * [new ref]         155673080c59b0ec73fcab658b652b7ef3eb3692 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1556730 Don’t mention removed games in menus or documentation.