$ git clone -n https://src.fedoraproject.org/rpms/xbyak_aarch64.git /var/lib/mock/f39-build-2500747-61675/root/chroot_tmpdir/scmroot/xbyak_aarch64
Cloning into '/var/lib/mock/f39-build-2500747-61675/root/chroot_tmpdir/scmroot/xbyak_aarch64'...
$ git fetch origin f269e375cd4cb62a1d55d2d8708b0bb6f1cfb1dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xbyak_aarch64
 * [new ref]         f269e375cd4cb62a1d55d2d8708b0bb6f1cfb1dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f269e37 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild