Fix. (#4635)

scripts/travis_rosetta_checker.sh

@@ -1,12 +1,14 @@
 #!/usr/bin/env bash
 set -e
 
+echo $TRAVIS_PULL_REQUEST_BRANCH
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
 echo $DIR
 echo $GOPATH
 cd $GOPATH/src/github.com/harmony-one/harmony-test
 git fetch
 git pull
+git checkout $TRAVIS_PULL_REQUEST_BRANCH || true
 git branch --show-current
 cd localnet
 docker build -t harmonyone/localnet-test .

scripts/travis_rpc_checker.sh

@@ -1,11 +1,13 @@
 #!/usr/bin/env bash
 set -e
 
+echo $TRAVIS_PULL_REQUEST_BRANCH
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
 echo $DIR
 echo $GOPATH
 cd $GOPATH/src/github.com/harmony-one/harmony-test
 git fetch
+git checkout $TRAVIS_PULL_REQUEST_BRANCH || true
 git pull
 git branch --show-current
 cd localnet