check if its only local branch (ethersphere#175)

Author: Ivan Vandot

.githooks/pre-push.bash

@@ -2,10 +2,14 @@
 
 set -euo pipefail
 
-# Check if we actually have commits to push
-commits=$(git log @{u}..)
-if [ -z "$commits" ]; then
-    exit 0
+# Get current branch name
+current=$(git rev-parse --abbrev-ref HEAD)
+if git branch -r | grep "^  ${1}/${current}$" &> /dev/null; then
+    # Check if we actually have commits to push
+    commits=$(git log @{u}..)
+    if [ -z "$commits" ]; then
+        exit 0
+    fi
 fi
 
 make build lint vet test-race