$ git clone -n https://src.fedoraproject.org/rpms/fluxbox.git /var/lib/mock/f42-build-886231-187212/root/chroot_tmpdir/scmroot/fluxbox
Cloning into '/var/lib/mock/f42-build-886231-187212/root/chroot_tmpdir/scmroot/fluxbox'...
$ git fetch origin f3312f8d97b81176903fd10bfe64f152868f880c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fluxbox
 * [new ref]         f3312f8d97b81176903fd10bfe64f152868f880c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f3312f8 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild