Error Collecting Changes for VCS Repo

Out of nowhere I've been seeing the following message pop up from TeamCity stating that it can't do a 'git fetch' due to insufficient space? I'm not sure why this happened or what happened but it just randomly taking place and I'm not sure how to fix it or what I should look into first.

Error collecting changes for VCS repository '"core2" 
'git fetch' command failed (repository dir: <TeamCity data dir>/system/caches/git/git-AD796054.git).
stdout: Error occurred during initialization of VM
Could not reserve enough space for 1433600KB object heap
elapsed time: 57ms
exit code: 1