Add debug line

# Rust tests and lints will be skipped. Delete if not intended.
[ci skip-rust]

# Building wheels and fs_util will be skipped. Delete if not intended.
[ci skip-build-wheels]

build-support/githooks/pre-commit

@@ -16,6 +16,9 @@ fi
 set -e
 
 MERGE_BASE="$(git_merge_base)"
+echo "HERE"
+echo "$(git rev-parse --symbolic-full-name --abbrev-ref HEAD@\{upstream\})"
+echo "DONE"
 
 # When travis builds a tag, it does so in a shallow clone without master fetched, which
 # fails in pants changed.