Update (git|review).openstack.org links to opendev

This updates links going to git.openstack.org and review.openstack.org
to go to their respective opendev locations to avoid redirects.

Change-Id: I78e3bb5303718962f591117f9c0ee11f2314b128
Closes-Bug: #1833256
diff --git a/tools/fixup_stuff.sh b/tools/fixup_stuff.sh
index 7482239..1fa053f 100755
--- a/tools/fixup_stuff.sh
+++ b/tools/fixup_stuff.sh
@@ -255,7 +255,7 @@
 # looking for the mirror config script before doing this, and just
 # skip it if so.
 
-# [1] https://git.openstack.org/cgit/openstack/diskimage-builder/tree/ \
+# [1] https://opendev.org/openstack/diskimage-builder/src/branch/master/ \
 #        diskimage_builder/elements/pip-and-virtualenv/ \
 #            install.d/pip-and-virtualenv-source-install/04-install-pip
 # [2] https://bugzilla.redhat.com/show_bug.cgi?id=1477823