Firstly, check the commits:
As-MacBook-Pro:Events aselims$ git log
commit dd2f0f7c2b3024ec29c2337be2f0a768a743a9a1
Author: aselims <selim.2k@gmail.com>
Date: Tue Jul 14 20:22:15 2015 +0200
time format.
commit 43032e348bf0015759836c4e5e035d66c62d05f1
Author: aselims <selim.2k@gmail.com>
Date: Tue Jul 14 19:37:09 2015 +0200
webFragment for support.
...
Then checkout the file you need from a specific revision
git checkout <revision> -- <path_to_file>
git checkout 43032e348bf0015759836c4e5e035d66c62d05f1 -- ./app/src/main/java/co/rahala/selim/events/util/WebFragment.java
The file is already now at its original place.
