$ git clone -n https://src.fedoraproject.org/rpms/libfixposix.git /var/lib/mock/f40-build-2294041-56244/root/chroot_tmpdir/scmroot/libfixposix
Cloning into '/var/lib/mock/f40-build-2294041-56244/root/chroot_tmpdir/scmroot/libfixposix'...
$ git fetch origin 8b748f8ce99b1257f669727339cf5871d5a82096:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libfixposix
 * [new ref]         8b748f8ce99b1257f669727339cf5871d5a82096 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8b748f8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild