$ git clone -n https://src.fedoraproject.org/rpms/xxhash.git /var/lib/mock/f31-build-61154-28827/root/chroot_tmpdir/scmroot/xxhash
Cloning into '/var/lib/mock/f31-build-61154-28827/root/chroot_tmpdir/scmroot/xxhash'...
$ git reset --hard 39c693e805ea7e9699112a40665a2465659db720
HEAD is now at 39c693e Update to version 0.7.0