+# Don't download the full Mesa history to speed up cloning. However the clone
+# depth must not be too small, otherwise builds might fail when lots of patches
+# are committed in succession, because the desired commit is not found on the
+# truncated history.
+#
+# See also:
+# - https://www.appveyor.com/blog/2014/06/04/shallow-clone-for-git-repositories
+clone_depth: 100