$ git clone -n https://src.fedoraproject.org/rpms/libbraiding.git /var/lib/mock/f40-build-786137-134192/root/chroot_tmpdir/scmroot/libbraiding
Cloning into '/var/lib/mock/f40-build-786137-134192/root/chroot_tmpdir/scmroot/libbraiding'...
$ git fetch origin 6a2517b8171d88ea8b6b0031465df3027dcac2cb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libbraiding
 * [new ref]         6a2517b8171d88ea8b6b0031465df3027dcac2cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a2517b Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild