$ git clone -n https://src.fedoraproject.org/rpms/subversion.git /var/lib/mock/f40-build-774054-127571/root/chroot_tmpdir/scmroot/subversion
Cloning into '/var/lib/mock/f40-build-774054-127571/root/chroot_tmpdir/scmroot/subversion'...
$ git fetch origin ec0991468e5547c2d53b0b26420e688d285b1190:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/subversion
 * [new ref]         ec0991468e5547c2d53b0b26420e688d285b1190 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec09914 Fix testing of binary patch