/etc/schroot/minimal/fstab is in schroot 1.6.10-4build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | # fstab: static file system information for chroots.
# Note that the mount point will be prefixed by the chroot path
# (CHROOT_PATH)
#
# <file system> <mount point> <type> <options> <dump> <pass>
/proc /proc none rw,bind 0 0
/sys /sys none rw,bind 0 0
|