$ git clone -n https://src.fedoraproject.org/rpms/bottles.git /var/lib/mock/f39-build-1530866-36198/root/chroot_tmpdir/scmroot/bottles
Cloning into '/var/lib/mock/f39-build-1530866-36198/root/chroot_tmpdir/scmroot/bottles'...
$ git fetch origin 05fed040e000280e2f978d65b8ce86c76de8c4d8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bottles
 * [new ref]         05fed040e000280e2f978d65b8ce86c76de8c4d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05fed04 Add Packit config