I am not sure this is the good way to do this, but...
Index: ChangeLog
from Benoît Perrot <benoit(a)lrde.epita.fr>
* bootstrap: Update the time stamp of reference output files to
avoid them to be illegitimately regenerated when checked out from
the repository.
2004-10-31 Benoît Perrot <benoit(a)lrde.epita.fr>
Index: bootstrap
--- bootstrap (revision 144)
+++ bootstrap (revision 145)
@@ -4,4 +4,7 @@
cd src/inst
../../dev/inst-nodes-mk-gen.py < ../../dev/nolimips.xml > nodes.mk
cd $here
+
+find tests -name '*.ref' -exec touch '{}' ';'
+
autoreconf -f -v -i -m