$ git clone -n https://src.fedoraproject.org/rpms/emacs-slime.git /var/lib/mock/f39-build-1991595-43416/root/chroot_tmpdir/scmroot/emacs-slime
Cloning into '/var/lib/mock/f39-build-1991595-43416/root/chroot_tmpdir/scmroot/emacs-slime'...
$ git fetch origin b5405f47ff856125dff9592fd2ece0e91d1c43ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/emacs-slime
 * [new ref]         b5405f47ff856125dff9592fd2ece0e91d1c43ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5405f4 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild