$ git clone -n https://src.fedoraproject.org/rpms/arm-none-eabi-newlib.git /var/lib/mock/f38-build-side-42-init-devel-855760-28426/root/chroot_tmpdir/scmroot/arm-none-eabi-newlib
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-855760-28426/root/chroot_tmpdir/scmroot/arm-none-eabi-newlib'...
$ git fetch origin 718a2b8dcc708dac84a8691a3e31cbd8b8013c6c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arm-none-eabi-newlib
 * [new ref]         718a2b8dcc708dac84a8691a3e31cbd8b8013c6c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 718a2b8 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild