gulp-inject-git-rev 
Gulp plugin to inject the git revision number
Usage
Install the plugin:
npm install gulp-inject-git-rev --save
Add the %%GULP.GIT_REV_VERSION%% placeholder to any of your files, e.g.:
<html>
<head>
<script>
window.REV_VERSION = '%%GULP.GIT_REV_VERSION%%';
console.log(`This is revision ${window.REV_VERSION}.`);
</script>
</head>
<body>
Hello world from revision %%GULP.GIT_REV_VERSION%%!
</body>
</html>
Finally, add the plugin to your gulpfile.js:
const injectGitRev = require('gulp-inject-git-rev');
gulp.task('default', ['fetch-git-rev'], function() {
return gulp.src('src/**/*')
.pipe(injectGitRev())
.pipe(gulp.dest('dist'));
}