So I was tearing my hair out trying to figure out why attempts to push via 
DAV to a git repo were failing.

Eventually I succeeded in stracing the httpd process sto capture the 
request. It was getting an EROFS when it tried to write to the git repo.

Amusing.

To make a long story short, the culprit was:

ProtectHome=read-only

in /lib/systemd/system/httpd.service,(the git repo was in a directory inside 
a mounted /home partition).

I tried using

systemctl edit httpd

And putting this in there:

[Service]
ProtectHome=

However this apparently did not work. I threw in the towel and just edited 
/lib/systemd/system/httpd.service and commented this setting out, entirely, 
to finally fix this issue, and happy git pushing resumed.

But how do I fix this so that the next apache update doesn't clobber this?