Altium VersionControl_RevNumber special string
Try this with VersionControl_ProjFolderRevNumber and VersionControl_RevNumber: 


  In the Project Panel > Right Click on Source Documents > Open All.
  
  Then RClick Source Documents > Save All. 
  
  Then RClick on the Project.PrjPcb > Version Control > Commit Whole
  Project.
  
  The .VersionControl_RevNumber works in the PcbDoc, however you may
  need to save, close and open the Pcbdoc to display the special stringl
  .VersionControl_RevNumber.
  
  You may need to first enter .VersionControl_RevNumber then edit the
  text string and add any prefixes or suffixes as desired, i.e. SVN#
  .VersionControl_RevNumber
  
  The '.VersionControl_RevNumber' bug. Notice Altium will add leading
  and trailing single quote characters to .VersionControl_RevNumber
  string in the PCB editor, you must also remove the quotes.
  
  In the schematic if the SVN Ver Number is not displayed, try holding
  down your Ctrl Key and roll the mouse wheel, the page should refresh
  and display the =.VersionControl_RevNumber string.


Source: altiumpcbdesigner.blogspot