Avoid race condition in caching git commit hash
Avoid race condition in caching git commit hash

Summary:
Avoid race condition in caching git commit hash
by relying on atomicity of /bin/mv

Closes T481.

Replace tabs with spaces.

Test Plan: test if git commit hashing still works

Reviewers: pmaanen

Reviewed By: pmaanen

Maniphest Tasks: T481

Differential Revision: https://dev.openmha.org/D94

HoerTech-gGmbH/openMHA,HoerTech-gGmbH/openMHA,HoerTech-gGmbH/openMHA,HoerTech-gGmbH/openMHA,HoerTech-gGmbH/openMHA,HoerTech-gGmbH/openMHA,HoerTech-gGmbH/openMHA,HoerTech-gGmbH/openMHA