$ git clone -n https://src.fedoraproject.org/rpms/xxhash.git /var/lib/mock/f31-build-101797-33436/root/chroot_tmpdir/scmroot/xxhash
Cloning into '/var/lib/mock/f31-build-101797-33436/root/chroot_tmpdir/scmroot/xxhash'...
$ git reset --hard c2fc54f5b6ed46b54bfc1e268f75fbf7cbe52af8
HEAD is now at c2fc54f Update to version 0.7.1