Try renaming your script w/out the .sh at the end.
See second paragraph at
http://svnbook.red-bean.com/nightly/en/svn.ref.reposhooks.html.
From: Andreas Stieger [mailto:andreas.stie...@gmx.de]
Sent: Friday, May 19, 2017 4:16 AM
To: users@subversion.apache.org
Subject: Re: about svnsync
You
You have to create a working pre-revprop-change-hook.
http://svnbook.red-bean.com/nightly/en/svn.reposadmin.maint.html#svn.reposadmin.maint.replication.pre-revprop-change
Gesendet: Freitag, 19. Mai 2017 um 08:39 Uhr
Von: Dummy <3295285...@qq.com>
An: users
Betreff: [wait on line]about svnsyn