Basically it is a kernel (or possibly ACPI) crash. I'm not knowledgeable enough to say where or why. It might be a one off. I'll ask around.
Large git clones often freeze here, leaving a zombie process that requires a reboot to get rid off, likely memory problems. You should probably increase your VIRTUALADDRESSLIMIT in config.sys. Maximum value is 3072, sometimes it interferes with PCI address space. other values 2816, 2560, 2304 and safer, 2048. In hex, need to end in 00.
I'm running on real hardware and sometimes the only solution is to boot to Linux (Mint in my case, it mounts OS/2 JFS partitions pretty well, even case insensitive) and clone it there. Still potential problems as Linux can create files that OS/2 can't handle such as symlinks or hard links. On OS/2 symlinks are a libc thing kept in extended attributes (xttrs). HPFS is likely safer but has things like the 2GB file limit.