$ git clone -n http://fedora.riscv.rocks:3000/rpms/libcxxabi.git /var/lib/mock/f37-build-680232-76817/root/chroot_tmpdir/scmroot/libcxxabi
Cloning into '/var/lib/mock/f37-build-680232-76817/root/chroot_tmpdir/scmroot/libcxxabi'...
$ git reset --hard 91b025bac1315a4f9680cd30259b9be8557c8fea
HEAD is now at 91b025b Fix spec