Looks like it works - bower will resolve to the latest commit on the `master` branch.

```shell
$ bower install lucasmazza/jquery-rails-without-version
bower jquery-rails-without-version#*           cached git://github.com/lucasmazza/jquery-rails-without-version.git#1c88333c62
bower jquery-rails-without-version#*         validate 1c88333c62 against git://github.com/lucasmazza/jquery-rails-without-version.git#*
bower jquery#>1.7.* <2.0.0                     cached git://github.com/components/jquery.git#1.10.2
bower jquery#>1.7.* <2.0.0                   validate 1.10.2 against git://github.com/components/jquery.git#>1.7.* <2.0.0
bower jquery-ujs#*                            install jquery-ujs#1c88333c62
bower jquery#>1.7.* <2.0.0                    install jquery#1.10.2
```