diff --git a/bootstrap/change-tag-in-pdc.py b/bootstrap/change-tag-in-pdc.py
new file mode 100644
index 00000000..b6909d2f
--- /dev/null
+++ b/bootstrap/change-tag-in-pdc.py
@@ -0,0 +1,36 @@
+import os
+import sys
+
+import pdc_client
+
+servername, token, variant_uid, new_tag = \
+    sys.argv[-4], sys.argv[-3], sys.argv[-2], sys.argv[-1]
+
+if os.path.basename(__file__) in (servername, token, variant_uid,):
+    raise ValueError("Provide a PDC server name defined in "
+                     "/etc/pdc.d/ and a token")
+
+print("Connecting to PDC server %r with token %r" % (servername, token))
+pdc = pdc_client.PDCClient(servername, token=token)
+
+print("Querying for %r to see what tag it has today" % variant_uid)
+obj = pdc['unreleasedvariants'][variant_uid]()
+answer = raw_input("Change koji_tag for %r from %r to %r? [y/N]" % (
+    variant_uid, obj['koji_tag'], new_tag))
+if not answer.lower() in ('y', 'yes'):
+    print("Exiting, taking no action.")
+    sys.exit(0)
+
+print("Submitting PATCH to new_tag.")
+# Do it this way once we fix that ugly PATCH bug.
+#pdc['unreleasedvariants'][variant_uid] += {
+#    'variant_uid': variant_uid,
+#    'koji_tag': new_tag,
+#}
+try:
+    # This way works, but it *always* throws a TypeError.
+    pdc['unreleasedvariants/'] += {variant_uid: {'koji_tag': new_tag}}
+except TypeError:
+    pass
+
+print("Done.")