$ git clone -n http://fedora.riscv.rocks:3000/rpms/emacs.git /var/lib/mock/f41-build-855658-167289/root/chroot_tmpdir/scmroot/emacs
Cloning into '/var/lib/mock/f41-build-855658-167289/root/chroot_tmpdir/scmroot/emacs'...
$ git fetch origin 4c5d256ec91ac6f7a6d1535adb797a338ceeeaf9:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/emacs
 * [new ref]         4c5d256ec91ac6f7a6d1535adb797a338ceeeaf9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c5d256 Bring back non-existing file