Armv7 alpha-1 git problems

An installation of alpha-1 on armv7 successfully built world and
kernel, installed both and reported during reboot:
FreeBSD 14.0-ALPHA2 armv7 1400096 #1 main-n264912-b1d3e2b77155: Tue Aug 22 22:40:54 UTC 2023
    root@generic:/usr/obj/usr/src/arm.armv7/sys/GENERIC arm
FreeBSD clang version 16.0.6 (https://github.com/llvm/llvm-project.git llvmorg-16.0.6-0-g7cbf1a259152)

The machine is a Pi2 v1.1 with a machanical hard disk, using bootcode.bin only on microSD

It then failed to complete git clone of ports.

The first failure was 
# git clone ssh://[email protected]/ports.git .
Cloning into '.'...
remote: Enumerating objects: 5931073, done.
remote: Counting objects: 100% (936/936), done.
remote: Compressing objects: 100% (120/120), done.
error: inflate: data stream error (invalid code lengths set)0 KiB/s
fatal: pack has bad object at offset 46086135: inflate returned -3
fatal: fetch-pack: invalid index-pack output

This looks vaguely like problems observed trying to clone /usr/src,
but not quite the same. That was worked around using sftp from another
machine's sources, with a successful git pull following.

Next, I tried
# git clone https://git.FreeBSD.org/ports.git .
Cloning into '.'...
remote: Enumerating objects: 5931073, done.
remote: Counting objects: 100% (936/936), done.
remote: Compressing objects: 100% (120/120), done.
panic: invalid signal8% (519050/5931073), 124.84 MiB | 719.00 KiB/s
cpuid = 3
time = 1692775267
KDB: stack backtrace:
db_trace_self() at db_trace_self
         pc = 0xc05edb64  lr = 0xc0079c70 (db_trace_self_wrapper+0x30)
         sp = 0xc4dc1b78  fp = 0xc4dc1c90
db_trace_self_wrapper() at db_trace_self_wrapper+0x30
         pc = 0xc0079c70  lr = 0xc02e9d8c (vpanic+0x140)
         sp = 0xc4dc1c98  fp = 0xc4dc1cb8
         r4 = 0x00000100  r5 = 0x00000000
         r6 = 0xc076f4e8  r7 = 0xc0aeeec8
vpanic() at vpanic+0x140
         pc = 0xc02e9d8c  lr = 0xc02e9b6c (doadump)
         sp = 0xc4dc1cc0  fp = 0xc4dc1cc4
         r4 = 0xc4dc1d88  r5 = 0xd70112b8
         r6 = 0xd70112b8  r7 = 0x00000007
         r8 = 0xd7011000  r9 = 0xd7011000
        r10 = 0xbfc19800
doadump() at doadump
         pc = 0xc02e9b6c  lr = 0xc02f047c (trapsignal+0x2f8)
         sp = 0xc4dc1ccc  fp = 0xc4dc1d58
         r4 = 0xbfc19800  r5 = 0xc4dc1cc4
         r6 = 0xc02e9b6c r10 = 0xc4dc1ccc
trapsignal() at trapsignal+0x2f8
         pc = 0xc02f047c  lr = 0xc06119a4 (abort_handler+0x1a4)
         sp = 0xc4dc1d60  fp = 0xc4dc1df8
         r4 = 0xc4dc1d88  r5 = 0xd70112b8
         r6 = 0x00000001  r7 = 0x00000007
         r8 = 0x00000010  r9 = 0xd7011000
        r10 = 0xbfc19800
abort_handler() at abort_handler+0x1a4
         pc = 0xc06119a4  lr = 0xc05f042c (exception_exit)
         sp = 0xc4dc1e00  fp = 0xbfbfd6e8
         r4 = 0xbfbfd6a8  r5 = 0x00000041
         r6 = 0x3ae0921a  r7 = 0x0000009d
         r8 = 0x3aed4000  r9 = 0xbfbfe8a0
        r10 = 0x0000001c
exception_exit() at exception_exit
         pc = 0xc05f042c  lr = 0x204b807c (0x204b807c)
         sp = 0xc4dc1e90  fp = 0xbfbfd6e8
         r0 = 0xbfc19800  r1 = 0x3ae09074
         r2 = 0x00000114  r3 = 0x3ae09070
         r4 = 0xbfbfd6a8  r5 = 0x00000041
         r6 = 0x3ae0921a  r7 = 0x0000009d
         r8 = 0x3aed4000  r9 = 0xbfbfe8a0
        r10 = 0x0000001c r12 = 0x3ae09058
Unable to unwind into user mode
KDB: enter: panic
[ thread pid 1229 tid 100079 ]
Stopped at      kdb_enter+0x54: ldrb    r15, [r15, r15, ror r15]!
db> 

Not sure what to try next, probably update sources and build again.
Any suggestions welcome!

Thanks for reading,

bob prohaska